HEY, IS THIS THING ON?

HEH HEH!

WHAT YOU WANT TO LEARN TODAY?

>> I WANT TO KNOW WHY THINGS HAPPEN AND HOW NOW--OH, YEAH!

HOW DOES THIS THING WORK?

WHY DOES THAT STUFF CHANGE?

HOW DOES THAT DO WHAT IT JUST WHAT'S UP WITH THE SKY?

DO YOU THINK I COULD FLY?

THE WORLD IS SPINNING AND I WANT TO KNOW WHY I GOT A LOT OF QUESTIONS AND BIG IDEAS I'M... ♪ THIS IS GONNA BE SO COOL.

BUDDY.

AHH.

OH, HI!

IT'S ME--SID!

I PUT IGNATZ, MY FAVORITE-- AND BRAVEST--PANDA ON MY SKATEBOARD.

WHY IS HE SO BRAVE?

BECAUSE HE'S AGREED TO GO ON THIS-- THE MOST SUPER-DUPER SKATEBOARD RIDE EVER!

YAY!

OK, IGNATZ, I'M ALMOST READY.

JUST GOTTA DO A FINAL CHECKLIST.

MMM-KAY.

IGNATZ ON SKATEBOARD?

CHECK.

HMM.

SKATEBOARD IN ROLLING POSITION?

CHECK.

IS THE AUDIENCE READY?

OK, IGNATZ, ARE YOU READY?

HMM.

I'M GONNA TAKE THAT AS A YES.

CHECK!

WELL, THEN, IT'S TIME TO ROLL!

3, 2, 1, BLAST-OFF.

UHH.

OK, THE SKATE ROLLING ALONG.

IGNATZ IS LOOKING GOOD AND-- [GASP] HIT THE BENCH!

AND IGNATZ WENT FLYING FORWARD!

AAH!

IGNATZ!

IGNATZ!

HEY, BUDDY!

ARE YOU OK?

CAN YOU HEAR ME?

AHH.

"YEAH, SID.

I'M OK." OH, WHOO-HOO!

HEY, EVERYBODY, IGNATZ IS OK!

I REPEAT, IGNATZ IS ALL RIGHT, FOLKS.

AHH.

HEY.

WAIT A MINUTE.

THE SKATEBOARD STOPPED MOVING RIGHT HERE, BUT IGNATZ KEPT GOING FORWARD.

HOW DID THAT HAPPEN?

IGNATZ SHOULD'VE STOPPED WHEN THE SKATEBOARD STOPPED.

I DON'T GET IT.

HMM.

I JUST GOTTA KNOW.

WHY DID IGNATZ FLY... [ECHOING] FORWARD?

>> SID!

BREAKFAST TIME!

>> YAY!

BREAKFAST TIME!

BREAKFAST TIIIME!

HEY, GOOD MORNING, MOM.

>> OH, HI, SID, AND HEY THERE, IGNATZ.

>> OH.

MORNING, MOM.

>> SO, GUYS, HOW DID THE BIG SKATEBOARDING ADVENTURE GO?

>> WELL, ACTUALLY, SOMETHING VERY, VERY STRANGE HAPPENED.

>> SOMETHING STRANGE?

WHAT HAPPENED, SID?

>> HA HA.

HEY, DAD.

HI, ZEKIE.

OK.

HERE IS WHAT HAPPENED.

PRETEND MY HAND IS A SKATEBOARD, OK, AND IGNATZ IS RIDING ON TOP.

THE SKATEBOARD--THAT'S STILL MY HAND--STARTED ROLLING, AND IT KEPT ROLLING AND ROLLING AND ROLLING, AND THEN SUDDENLY, BAM!

>> YEAH.

THE SKATEBOARD BUMPED RIGHT INTO THE BENCH AND IT STOPPED.

BUT IGNATZ KEPT MOVING FORWARD.

>> WHOA!

THAT IS A GREAT STORY, LANDED SAFELY.

>> YEAH.

HE WAS OK.

BUT I WANT TO KNOW WHY THE SKATEBOARD STOPPED BUT IGNATZ DIDN'T STOP.

>> OOH.

GREAT QUESTION, SID.

LET'S THINK THROUGH THIS THE SKATEBOARD?

>> OK, AND WHAT STOPPED IGNATZ?

>> OH, UM, WELL, I GUESS NOTHING STOPPED HIM, REMEMBER, BECAUSE HE FLEW FORWARD.

HEY, WAIT.

YEAH, NOTHING STOPPED IGNATZ FROM MOVING FORWARD.

>> SID, I THINK YOU'RE ON TO SOMETHING.

>> HA.

ME, TOO.

WELL, I'M GONNA INVESTIGATE THIS MORE AT SCHOOL.

>> MM-HMM.

BUT FIRST, BREAKFAST.

OH, AND SID, REMEMBER THAT GABRIELA IS COMING OVER FOR A PLAY DATE AFTER SCHOOL.

MAYBE YOU TWO CAN INVESTIGATE TOGETHER.

>> THAT'S A GOOD IDEA, MOM.

THANKS!

♪ I LOVE MY MOM >> UH-HUH >> MY MOM IS COOL >> BUT NOW IT'S TIME FOR HAVING FUN IN SCHOOL YEAH ♪ >> [LAUGHS] >> HI!

>> ♪ I'M LOOKING FOR MY FRIENDS I'M LOOKING FOR YOU THERE'S GABRIELA >> WATCH WHAT I CAN DO ♪ HA HA!

>> WOW!

♪ I'M LOOKING FOR MY FRIENDS I'M LOOKING FOR YOU HEY, THERE'S GERALD ♪ >> YEAH!

CHECK OUT MY MOVES!

HA-HA!

YEAH!

MMM!

UHH!

HA HA HA!

I'M A DANCING MACHINE!

>> COOL!

♪ I'M LOOKING FOR MY FRIENDS I'M LOOKING FOR YOU HEY, THERE'S MAY ♪ >> MAY I SHOW YOU HOW I GROOVE?

HA HA HA!

WHOO!

COOL!

>> GROOVY!

>> ♪ WE'RE LOOKING FOR OUR FRIENDS WE'RE LOOKING FOR YOU HEY, THERE'S SID ♪ >> DID YOU HEAR THE ONE ABOUT THE KID WHO WANTED TO KNOW EVERYTHING ABOUT EVERYTHING?

>> THAT'S YOU!

>> YOU GOT ME!

>> [LAUGHTER] >> ♪ DA-DA-DA-DA-DA-DA ♪ >> YEAH!

♪ WE'RE LOOKING FOR OUR FRIENDS AND LOOK WHO WE FOUND WE FOUND EACH OTHER FRIENDS!

♪ [LAUGHTER] >> AND NOW IT'S TIME FOR SID THE SCIENCE REPORTER!

>> HELLO.

IT'S ME, SID, AND I AM HERE LIVE ON THE SCHOOL PLAYGROUND.

I AM INVESTIGATING MOVING AND STOPPING.

HA HA.

OH.

HEY THERE, GERALD.

>> OH, HELLO, SID.

>> I'M DOING AN INVESTIGATION.

I WANT TO SEE WHAT HAPPENS WHEN YOU RUN FAST AND THEN SUDDENLY STOP.

CAN YOU DO THAT?

>> SURE, SID, I CAN.

AND I WILL!

>> OK, THERE HE GOES.

AND HE'S RUNNING.

HE'S RUNNING.

HE'S GETTING CLOSER.

OH, HE ALMOST BONKED INTO ME!

AND HIS FEET HAVE STOPPED, OH, BUT HIS BODY KEPT MOVING FORWARD.

HA HA.

BUT HE'S OK!

>> HE STOPPED AND HE'S OK. HA HA HA.

THE INVESTIGATION CONTINUES.

[HUMMING] >> HEY, SID!

>> OH, HI, MAY!

HI THERE, FLUFFLES!

>> "HI, SID."

>> I'M DOING AN INVESTIGATION.

CAN YOU SLIDE DOWN THAT SLIDE AND THEN STOP SO I CAN SEE WHAT HAPPENS?

>> SURE.

FLUFFLES AND I WILL BE WATCH THIS!

HERE WE GO!

>> MAY AND FLUFFLES ARE GONNA SLIDE DOWN THE SLIDE.

>> HOORAY!

>> OH, MAY STOPPED!

>> BUT FLUFFLES FLEW FORWARD!

OH, NO!

OH, WHEW.

FLUFFLES IS OK. >> AHH.

GOOD.

I'M GLAD FLUFFLES IS ALL RIGHT.

FORWARD WHEN YOU STOPPED.

HMM.

INTERESTING.

HUH.

THANKS, MAY AND FLUFFLES.

>> YOU'RE WELCOME.

>> OOH, THERE'S GABRIELA.

HI, GABRIELA.

>> HELLO.

>> I'M DOING AN INVESTIGATION.

CAN YOU RIDE YOUR TRICYCLE AND THEN STOP SO I CAN SEE WHAT HAPPENS?

>> OK. NO PROBLEM.

HERE I GO.

>> GREAT.

GABRIELA'S RIDING.

AND RIDING.

>> AND I'M GOING TO STOP.

THE TRICYCLE STOPPED MOVING, BUT I SLID FORWARD.

>> HUH.

TO STOP MYSELF.

>> YEAH.

HOORAY FOR HANDLEBARS!

>> YEAH!

>> [GIGGLING] >> AND NOW THE RESULTS OF MY MOVING AND STOPPING INVESTIGATION.

GERALD USED HIS FEET TO STOP RUNNING, BUT HIS BODY KEPT MOVING FORWARD A LITTLE BIT.

SHE STOPPED BUT FLUFFLES KEPT MOVING FORWARD.

>> WHEE!

BOMP!

WHOA!

FLUFFLES!

>> AND GABRIELA RODE HER TRICYCLE AND THEN STOPPED, AND SHE KEPT MOVING FORWARD.

>> [IMITATES TIRE SCREECH] >> WHOA.

>> STOP!

>> [LAUGHTER] >> AND THERE YOU HAVE IT.

I AM SID THE SCIENCE REPORTER AND YOU SAW IT HERE FIRST.

>> OOH, THAT'S TEACHER SUSIE.

>> [ALL SPEAKING AT ONCE] >> ♪ IT'S RUG TIME COME ON IN RUG TIME TAKE A SEAT RUG TIME ♪ >> WE'RE READY!

>> ♪ EVERYBODY MOVE YOUR FEET RUG TIME >> TEACHER SUSIE >> GOOD TIMES ON THE WAY RUG TIME COME ON IN WE'VE GOT A LOT TO LEARN TODAY ♪ >> HELLO!

HA HA HA!

HELLO AGAIN!

>> WHERE'D HE GO?

>> HELLO ONE MORE TIME!

>> STOP!

GERALD!

>> WHOA!

HA.

THANKS, GUYS.

>> WOW, GERALD.

YOU REALLY WANTED TO KEEP MOVING AND MOVING AND MOVING AND MOVING.

ABOUT MOVING AND STOPPING ON THE PLAYGROUND THIS MORNING.

>> YEAH.

SUSIE, I THINK I HAVE A BIG STORY TO REPORT.

>> OOH, LET'S HEAR IT, SID.

>> MMM, OK. AHEM.

THIS MORNING, MY PANDA IGNATZ WAS RIDING ON MY SKATEBOARD OUTSIDE.

HE WAS ROLLING ALONG, NO PROBLEM, UNTIL THE SKATEBOARD BUMPED--BAM--INTO A BENCH ON THE PATIO.

>> WHOA!

WELL, WHAT HAPPENED TO THE SKATEBOARD, SID?

>> MY SKATEBOARD STOPPED, BUT IGNATZ WENT FORWARD LIKE THIS.

YIIIKES!

>> WELL, SID, YOU'VE MADE A DISCOVERY ABOUT HOW THINGS MOVE AND STOP.

>> I DID?

>> YOU SURE DID.

YOU DESCRIBED WHAT SCIENTISTS CALL INERTIA.

>> INERTIA?

>> UH-HUH.

INERTIA MEANS THAT WHEN SOMETHING IS IN MOTION, IT STAYS IN MOTION UNTIL IT'S STOPPED.

>> IT'S LIKE IGNATZ.

HE KEPT MOVING FORWARD EVEN THOUGH SID'S SKATEBOARD STOPPED.

>> IS THAT INERTIA?

>> SURE IS, MAY.

WELL, I THINK IT'S TIME TO GO INVESTIGATE MORE THE... >> SUPER FAB LAB!

>> RIGHT.

GRAB YOUR JOURNALS.

LET'S GO OUTSIDE.

>> [ALL CLAMORING] >> IT'S THE SUPER FAB LAB.

>> OUTSIDE!

HA HA HA!

OBSERVE, COMPARE, CONTRAST!

AH!

>> WOW!

>> OK, SCIENTISTS, TODAY WE'RE >> WOW!

YOU NAMED AN INVESTIGATION AFTER ME AND MY SKATEBOARD.

>> I SURE DID BECAUSE PUTTING IGNATZ ON YOUR SKATEBOARD AND ROLLING HIM TO A STOP IS A GREAT WAY TO OBSERVE WHAT INERTIA IS.

>> WELL, YEAH, BUT WAIT.

THERE'S NO IGNATZ HERE, SO WHAT ARE WE GOING TO USE?

>> SINCE IGNATZ ISN'T HERE, WE'LL USE STEGGY THE STEGOSAURUS FROM OUR CLASSROOM.

OK, LET'S PUT STEGGY ON THE SKATEBOARD AND >> OK. >> OH!

YOU MEAN LIKE IGNATZ ON THE SKATEBOARD.

>> RIGHT.

THEN I WANT EVERYONE TO OBSERVE WHAT HAPPENS TO OUR STEGOSAURUS WHEN THE SKATEBOARD HITS THE STEP.

>> OH!

HEY, SUSIE, THERE'S A WAGON, TOO.

WHAT ARE WE PUTTING IN THERE, A BIGGER DINOSAUR?

HA HA!

>> ACTUALLY, EACH OF YOU WILL WAGON WHILE I PULL IT.

>> ALL RIGHT!

>> THEN I'LL STOP THE WAGON AND YOU CAN OBSERVE WHAT HAPPENS TO YOUR BODY WHEN THE WAGON STOPS.

>> OOH!

WE'LL BE LIKE THE STEGOSAURUS.

>> THAT'S RIGHT, GABRIELA.

OK, SCIENTISTS, LET'S START INVESTIGATING.

WHO WANTS TO BE THE FIRST TO PUSH THE SKATEBOARD?

>> [ALL SHOUT AT ONCE] >> HEY, YOU'RE A SCIENTIST.

YOU CAN TRY THIS, TOO.

>> LET'S INVESTIGATE INERTIA.

FIRST, PUT A WOODEN BLOCK ON A SKATEBOARD.

THEN PUSH THE SKATEBOARD SLOWLY TOWARD THE MAT.

THE SKATEBOARD ROLLED UNTIL SOMETHING STOPPED IT.

THAT'S INERTIA, BUT NOTHING STOPPED THE BLOCK ON TOP, SO IT KEPT MOVING FORWARD.

TRY IT AGAIN, AND THIS TIME PUSH THE SKATEBOARD REALLY HARD.

LOOK AT THAT!

THE FASTER FARTHER THE BLOCK FLIES FORWARD.

LET'S SEE WHAT HAPPENS WHEN WE USE THIS TURTLE STUFFED ANIMAL.

THE SKATEBOARD STOPPED, BUT THE TURTLE KEPT MOVING FORWARD.

TRY IT WITH THIS TOY PIG.

THE SKATEBOARD ROLLED UNTIL IT HIT THE MAT AND STOPPED.

THAT'S INERTIA, BUT NOTHING STOPPED THE PIG; IT KEPT MOVING FORWARD.

NOW YOU'RE GOING TO TAKE A RIDE INERTIA.

A GROWNUP WILL PULL YOU AND THEN STOP THE WAGON.

EVEN THOUGH THE WAGON IS STOPPING, NOTHING IS STOPPING YOU.

DID YOU FEEL YOUR BODY MOVE FORWARD A LITTLE?

THAT'S INERTIA.

NOW DRAW SOME PICTURES IN YOUR JOURNAL SO YOU CAN REMEMBER HOW WE DID OUR INVESTIGATION TODAY.

FIRST, WE PUT THE WOODEN BLOCK ON THE SKATEBOARD, AND WHEN WE ROLLED IT TO A STOP, THE BLOCK KEPT MOVING FORWARD.

THEN WE USED A TURTLE STUFFED ANIMAL, AND THEN WE USED A SMALL TOY THEN YOU WENT ON THE WAGON, AND WHEN IT STOPPED, YOU MOVED INERTIA, SCIENTISTS.

>> HA HA HA HA!

>> GO, GABRIELA!

>> AND NOW, GET READY TO STOP!

>> WHOA!

WOW!

THAT WAS FUN.

I WAS ROLLING AND ROLLING, AND WHEN I STOPPED, I MOVED FORWARD A LITTLE BIT.

>> UH-HUH.

>> WOW.

HA HA!

HEY, THAT'S WHAT HAPPENED WHEN I WAS IN THE WAGON, TOO.

LOOK.

I DREW A PICTURE OF ME MOVING FORWARD IN MY JOURNAL.

>> NICE DRAWING, SID.

WOW!

MY SCIENTISTS ARE MAKING LOTS OF DISCOVERIES ABOUT INERTIA.

I THINK IT'S TIME TO PLAY WITH ALL YOUR NEW IDEAS.

>> [ALL CLAMORING] >> HAVE FUN.

>> YAY!

HA HA HA!

HEY, EVERYBODY!

LET'S MAKE UP A STORY ABOUT INERTIA!

>> COOL!

>> YEAH!

RIGHT, I GOT IT.

OK, WE'RE ALL RIDING ON A BIG WAGON, OK?

GET IN THE WAGON.

>> OK. >> OK, WE'RE IN THE LAND OF FOOD!

>> HA HA!

YAY!

>> ALL RIGHT.

WE'RE ON A WAGON, AND WE'RE RIDING THE WAGON DOWN >> AND THE WAGON IS MOVING AND MOVING.

NOTHING CAN STOP US!

>> YEAH.

OOH, BUT NOW WE'RE REALLY HUNGRY, SO WHILE WE'RE STILL MOVING, WE CAN EAT ALL THE FOOD WE SEE ALONG THE WAY.

OOH.

HEY, I SEE SPAGHETTI.

MMM.

THIS SPAGHETTI IS GOOD.

>> OH!

TRY THE MASHED POTATOES.

>> OH, TRY THE YOGURT!

>> AND THE WAGON IS MOVING AND-- OH, NO, LOOK!

WE'RE ROLLING RIGHT INTO A GIANT BROCCOLI TREE!

>> OH, NO!

>> LOOK OUT!

>> HERE IT COMES!

HERE IT COMES!

BOOM!

WE HIT THE BROCCOLI TREE!

>> OUR WAGON STOPPED, BUT NOTHING STOPPED US.

WE'RE ALL STILL MOVING FORWARD.

>> AH!

HA HA HA!

HEY!

HEY, LOOK, EVERYBODY!

WE JUST LANDED SAFELY IN A BIG LAKE OF APPLESAUCE!

YUM, YUM!

>> THE END!

>> [ALL LAUGH] >> LET'S PLAY THE INERTIA GAME.

>> OH, YEAH!

>> EVERYONE PRETEND YOU'RE A STUFFED ANIMAL RIDING ON A SKATEBOARD.

>> OK!

>> OK, EVERYONE PUT ON YOUR PRETEND HELMETS.

>> RIGHT.

>> OK. HELMET, CHECK.

HEY, I'M A STUFFED ANIMAL OCTOPUS.

HA HA!

>> I'M A STUFFED ANIMAL HIPPO.

>> I'M A STUFFED ANIMAL FLAMINGO.

>> AND I'M IGNATZ THE PANDA.

TA-DA!

>> OK, LET'S ROLL.

>> HEY!

HEY, LOOK AT ME.

I'M MOVING, MOVING, MOVING.

>> OUR SKATEBOARDS ARE IN MOTION.

>> UH-OH.

HERE COMES A BIG WALL GETTING CLOSER.

>> AAH!

MOVING FORWARD!

SKATEBOARD, BUT I KEPT MOVING.

>> ME, TOO!

>> HEY, LOOK.

OUR SKATEBOARDS ARE WAY BACK THERE.

>> WHOA!

WE SURE FLEW A LONG WAY.

>> YEAH.

>> STUFFED ANIMALS, ARE YOU OK?

>> I'M OK. >> YEAH, I'M OK, TOO.

BOY, BEING A STUFFED ANIMAL ON A SKATEBOARD CAN BE ROUGH.

HA HA!

BE CAREFUL, STUFFED ANIMALS.

>> YEAH, COME ON!

>> OK. >> COME ON, EVERYBODY!

MAKE YOUR SKATEBOARD STOP!

HA HA HA!

>> AND NOW... >> IT'S TIME... >> FOR SUSIE... >> TO SING.

>> GO, SUSIE!

>> HA HA HA!

THANK YOU.

OH, YOU KNOW, IGNATZ THE LITTLE SKATEBOARDER WAS REALLY THE PERFECT EXAMPLE OF INERTIA.

BUT JUST WAIT TILL YOU SEE THE AMAZING THINGS GROWN-UP SKATEBOARDERS CAN DO, ALL THANKS TO INERTIA.

♪ YOU WANT TO SKATEBOARD ON A SUNNY DAY BY THE OCEAN SO YOU GIVE YOURSELF ONE GOOD PUSH NOW YOU AND YOUR SKATEBOARD STAY IN MOTION YOU WANT TO KNOW WHY I'LL TELL YOU WHY AS YOU AND YOUR SKATEBOARD GO ROLLING BY INERTIA KEEPS THE SKATEBOARD ROLLING INERTIA KEEPS IT ON THE GO A SKATEBOARD IN MOTION TENDS TO STAY IN MOTION THAT'S INERTIA NOW YOU, NOW YOU KNOW-O YEAH, YOU KNOW-O NOW YOU KNOW-O YEAH, YOU KNOW WHOO!

YOU SKATEBOARD PAST THE SCHOOLYARD PAST THE GROCERY STORE THAT SKATEBOARD KEEPS ROLLING ON AND ON YOU DON'T HAVE TO PUSH IT ANYMORE BECAUSE INERTIA KEEPS THE SKATEBOARD ROLLING INERTIA KEEPS IT ON THE GO TENDS TO STAY IN MOTION THAT'S INERTIA INERTIA >> NOW YOU KNOW-O >> INERTIA NOW YOU KNOW ♪ >> HA HA HA!

ALL RIGHT!

>> I'M A SKATEBOARDER.

ZOOM ZOOM, ZOOM ZOOM!

>> YEAH, ME, TOO.

THANKS, INERTIA!

HA HA!

>> ZOOM ZOOM!

>> OOH, OOH, SID, IT'S TIME FOR OUR PLAY DATE.

>> OH, RIGHT!

I CAN'T WAIT!

WE'RE GOING TO PLAY AND THEN MORE.

IT'S GOING TO BE GREAT.

>> OK, MY SKATEBOARDING SCIENTISTS.

TIME TO GO HOME.

>> [ALL CLAMORING] >> HO HO!

THERE'S MY SID.

>> IT'S MY GRANDMA!

>> [CHUCKLES] AND THERE'S GABRIELA.

>> HI!

>> HELLO.

HERE WE GO, KIDS.

>> HA HA HA!

>> WHOO!

HA HA!

YEAH!

>> ♪ BACK-SEAT DRIVING [GRANDMA TURNS OFF MUSIC] >> SO, KIDDOS, TELL ME ABOUT YOUR DAY.

>> OH, IT WAS GREAT.

THIS MORNING, IGNATZ WAS RIDING ON MY SKATEBOARD AND IT HIT A BENCH.

BAM!

>> WHOA!

>> YEAH.

IGNATZ KEPT ON MOVING, EVEN THOUGH THE SKATEBOARD WAS STOPPED, AND THAT'S CALLED INERTIA.

>> WOW.

THAT'S A BIG WORD.

>> OH, OH, AND AT SCHOOL WE GOT TO RIDE A WAGON THAT SUSIE PULLED, AND WHEN THE WAGON STOPPED, WE GOT TO FEEL INERTIA.

>> FEEL IT, HUH?

OOH, WHAT A GREAT WAY TO LEARN ABOUT INERTIA.

OH, HEY, HERE'S SOMETHING.

DID YOU KNOW THAT INERTIA IS THE VERY REASON WE USE SEATBELTS TODAY?

>> REALLY?

>> YES.

A LONG TIME AGO, CARS DIDN'T HAVE SEATBELTS.

IT'S SOMETHING, THE PASSENGERS COULD STILL MOVE FORWARD, AND THAT'S RODE IN DIDN'T HAVE SEATBELTS FOR KIDS OR ADULTS.

WHEN I WAS A LITTLE OLDER, CARS GOT SEATBELTS THAT JUST WENT ACROSS YOUR LAP.

THEN NEWER CARS WERE MADE THAT HAD SEATBELTS THAT ALSO WENT ACROSS YOUR CHEST, JUST LIKE I'M WEARING AND YOU'RE WEARING RIGHT NOW.

YEP, TODAY'S CARS HAVE SEATBELTS AND CAR SEATS TO STOP OUR INERTIA IN CASE WE BUMP INTO SOMETHING, SO WE'RE ALWAYS AS SAFE AS CAN BE WHEN WE DRIVE.

>> YAY!

>> WOW, GRANDMA.

SO THAT'S WHY SAFE.

>> OH, YOU BETCHA.

MM-HMM.

>> WOW, SID.

YOUR GRANDMA KNOWS EVERYTHING.

>> YES, SHE DOES.

I HAVE THE SMARTEST, BEST GRANDMA IN THE WHOLE WORLD.

>> ♪ WE LEARNED SOMETHING COOL SOMETHING COOL TODAY WE KNOW IT UPSIDE DOWN AND INSIDE OUT WE LEARNED ALL ABOUT... ♪ >> WHOO-HOO!

>> ♪ INERTIA!

♪ >> HA HA!

>> ♪ TWO SCIENTISTS IN THE HOUSE ♪ >> HA HA HA!

SMACK.

[CLICK] [CANNED APPLAUSE] >> YEAH.

WHOO-HOO!

I THINK WE DID A PRETTY GOOD JOB.

>> OK, YEAH.

YEP.

YOU'RE IN CHARGE.

YOU GUYS READY TO ROLL?

>> OK, IGNATZ, THIS TIME YOU WON'T FLY FORWARD.

I PROMISE.

>> HELLO, YOU TWO.

>> HI, GRANDMA.

WANT TO SEE OUR NEW INVENTION?

>> I SURE DO.

>> LOOK.

IT'S SEATBELTS FOR STUFFED ANIMALS.

>> OH.

>> YEAH, WELL, IT'S TAPE HOLDING THE ANIMALS IN PLACE, BUT IT WORKS JUST LIKE A SEATBELT.

>> OH, WHAT A GREAT INVENTION.

YOU KIDS ARE SMART.

>> WE GOT THE IDEA FROM YOUR STORY.

>> OH, I LOVE IT!

HA HA HA!

>> OK, LET'S SEE IF THE SEATBELTS STOP THE STUFFED ANIMALS FROM MOVING WHEN THE SKATEBOARD STOPS.

>> LET'S GO ON AN INERTIA ADVENTURE.

3, 2, 1.

UHH!

AND THEY'RE THROUGH THE TUNNEL.

>> HA HA HA!

>> THEY'RE COMING UP TO THE BIG BLOCK IN THE ROAD AND-- >> [ALL CHEER] >> HA HA HA!

THE SKATEBOARD >> WHOO-HOO!

HOORAY FOR INVENTORS SID AND GABRIELA!

>> YAY!

HOORAY, US!

>> WHOO!

>> COME ON.

SID, LET'S DO IT AGAIN.

>> GREAT IDEA.

WHAT A DAY!

I LEARNED ALL ABOUT SOMETHING I'D NEVER HEARD OF BEFORE--INERTIA.

IT'S WHY WE NEED SEATBELTS IN A CAR, RIGHT, IGNATZ?

HA HA!

AH, WELL, I GUESS IGNATZ IS THINKING ABOUT IT.

HMM, YOU KNOW, ALL THIS TALK ABOUT INERTIA AND SEATBELTS GOT ME THINKING.

WHAT IF PEOPLE AND ANIMALS COULD USE A SEATBELT ALL THE TIME?

[GASPS] OK, I'VE GOT IT.

HERE'S MY SUPER-DUPER-UPER-SCHMUPER BIG IDEA!

I'M GOING TO INVENT A NEW KIND OF SEATBELT CALLED THE EVERYWHERE BELT.

IT'S A BACKPACK YOU WEAR EVERYWHERE YOU GO, AND THE BELT IS INSIDE AND IT JUST POPS OUT WHENEVER YOU NEED IT, LIKE, SAY, YOU'RE RIDING YOUR TRICYCLE ALONG THE PATH AND A BIG ELEPHANT STEPS IN YOUR WAY.

>> [ELEPHANT TRUMPETS] COMES POPPING OUT AND WRAPS AROUND YOU, AND YOU STOP.

AND IF YOU'RE ON A SCOOTER, AND A FAMILY OF LIONS WALKS IN FRONT >> DON'T WORRY.

YOUR HANDY EVERYWHERE BELT WILL WRAP AROUND YOU, AND YOU'LL STOP SAFELY.

OR SAY YOU'RE SURFING IN THE OCEAN AND A WHALE JUMPS OUT OF THE WATER.

>> WHOA.

>> YOUR EVERYWHERE BELT WILL WRAP AROUND YOU, SO WHEN YOU SLOW DOWN, YOU WON'T SLIDE FORWARD.

THANKS, EVERYWHERE BELT!

AND THAT'S MY IDEA!

[IMITATES CROWD ROARING] [CLICK] [CANNED APPLAUSE] YAY!

AH.

WELL, IT'S BEEN A LONG DAY AND I'M REALLY TIRED.

[YAWNS] I'M GOING TO BED AND NOTHING'S GOING TO STOP ME.

AH, HERE I GO.

I'M RUNNING AND RUNNING AND MOVING AND MOVING AND I'M NOT STOPPING AND I'M NOT--OOH!

HMM.

MY BED STOPPED ME.

I AM SID, THE MOVING AND STOPPING SCIENCE KID!

["SCIENCE KID" ECHOES] AND REMEMBER, KEEP ASKING LOTS AND LOTS OF QUESTIONS.

SEE YOU LATER, SCIENTISTS.

I'M MOVING, MOVING, MOVING, MOVING, MOVING, MOVING, MOVING, STOPPING.

[IMITATES CRASH] HA HA!

MOVING, MOVING, MOVING, STOPPING.

BLAM!

>> THERE'S LOTS MORE SCIENCE FUN TO EXPLORE ONLINE AT PBSKIDS.ORG.

[CAPTIONING MADE POSSIBLE BY THE JIM HENSON COMPANY] [CAPTIONED BY THE NATIONAL CAPTIONING INSTITUTE --www.ncicap.org--]