Sid explores the science of light and discovers that light comes from various energy sources.

Sid is sending his toy panda Ignatz on yet another adventure! He places him on top of a skateboard, then rolls him across his patio. The skateboard comes to an abrupt stop when it bumps into a wooden bench, but Ignatz keeps moving forward, flying into the air! Sid is curious why Ignatz didn't stop moving too, so he and his friends investigate and discover that things in motion stay in motion until they are stopped-and that's inertia!

Sid and his friends have a play date on their day off from school.

Sid is trying out his new dance called, "The Sid Slide To The Side!" On his room's hard wood floor, he boogies to the left, jumps to the right, then tries to slide to the side. But in his new sneakers, he can't slide...he just squeaks to a stop! This leads Sid and his friends to observe and investigate how different materials and surfaces can create friction, causing something to slow down.

Sid created a new sport called Play-Doh Ball! You just jump in the air, spin around, then bounce the ball. When Sid attempts to play his new game, he bounces the Play-Doh Ball, and it promptly splats on the ground! At school, Sid and his friends investigate and discover that if a ball doesn't have enough elasticity, it won't bounce!

Sid tries out a new dance, but his new sneakers make him squeak to a stop.

Sid learns about elasticity.

When Ignatz goes through inertia, Sid learns about it.

In his backyard, Sid is pretending to be "Super Sid!" To show us his super strength, he kicks a soccer ball really hard and it sails across the yard. But when he tries to kick it to a nearby tree with the same might, the ball once again sails across the yard. On a special trip to the Science Center, Sid and his friends investigate how using lots of force can make something move really far and really fast - just like kicking a soccer ball really hard!

Sid and his friends learn about force.

Sid learns about light.

Sid learns about darkness.

Sid learns about shadows.

After a storm, Sid notices a rainbow and learns about them.

Sid investigates rainbows and learns they can only form when light passes through water droplets.

Sid investigates shadows and explores ways to create a shadow by blocking a light source.

Sid and his friends show in the backyard and take turns singing their favorite science songs.

Sid learns where all the water goes in the sink and learns to not waste water.

Sid and his friends learn the importance of clean air.

When Sid nearly throws one of his favorite toys away, Flip, he learns about trash and recycling.

When Sid is going to have a basketball court in his backyard, he notices a stump with insects on it. Thus he learns about animal habitats.

Sid and his friends dress up for Halloween, and they learn that the spooky holiday is scientific as well.

Sid learns about different types of scientists.

Sid's mum volunteers to show his class how a computer works; students make discoveries with magnifying glasses in the Super Fab Lab.

Sid's toy robot is broken, so he wants to throw it "away." Sid's Mom tells him there is no such thing as "away," and when we put something in the trash, we are actually creating waste. Sid and his friends explore the idea that everything we throw away goes somewhere. This leads to an investigation of how to recycle and reuse items so that we make less trash.

Sid finds the moon is out at daytime and learns why.

When Sid attempts to fly, he learns about flying.

Sid tries to get his cereal box, but he can't reach it. At preschool, he and his friends try to get a ball down from a tree.

Sid the Science Kid: Encyclopedia of Discovery.

Susie targets several healthy surprises at preschool.

Sid hunts all the Easter Eggs in the backyard but comes across a big rock. At preschool, Sid and his friends investigate the rock.

While the kids have fun dressing up in spooky costumes for Halloween, they also learn that Halloween can be scientific, too.

Sid learns why sleep is important after his mom nixes his plan to stay up all night.

When Sid finds seeds in his apple and oranges, he learns about seeds.

Sid learns about allergies after he discovers that, like his dad, he's allergic to pollen.

It is sung by Kermit as the movie's opening number and reprised by the whole cast of Muppets at the end of the movie;