Sid learns about the value of charts when he has to fill up a chore chart with stickers to earn the opportunity to get a hot new toy.
Sid wants to observe his favorite bugs and learns that he can see their every move by using a magnifying glass to make his little friends bigger.
Sid learns about estimation when he brings home a jar full of seashells but doesn't have the time to count them individually.
Sid's ruler isn't even close to being big enough to measure the size of a blue whale, so he has to learn other ways to measure big things.
After collecting a ruler, an estimation jar, a chart and a magnifying glass, Sid has to decide which of his new science tools is his favorite.
Sid can't figure out why his banana turned from bright yellow into a brown, mushy mess, so he learns about how fruits and vegetables can change.
When Sid's shoes suddenly don't fit, he thinks they must be shrinking. But he soon learns what's really going on.
Sid learns all about the freezing and melting process when he wakes up to find that all of his ice pops have been reduced to a puddle.
Sid learns all about how heat changes things when his grandma teaches him how she makes such great pancakes.
Sid gets frustrated with all the changes in his life, like his shrunken shirt and the new toothpaste his mom bought for him.
An itchy shirt tag leads Sid to learn about different textures, like smooth, soft and bumpy.
Sid learns all about his sense of smell and how odors travel through the air and into his nose.
Sid knows that Grandma's glasses help her see better, but he wants to learn why his vision is all blurry when he puts them on.
Sid learns all about sound and how his ears pick up everything he hears.
Sid and his friends at school go on a journey of their senses: sight, sound, smell, taste and touch.
Sid learns that people have different kinds of teeth that do different chewing jobs.
Like most kids, Sid loves eating cake and other sweets, but he and his friends learn that the key to being healthy is eating nutritious food.
Sid learns that washing his hands with soap and water will help keep germs away so he doesn't have to worry about coughing and sneezing.
Sid doesn't feel good when he sits inside watching TV all weekend, so he learns that he needs to do some exercise to start feeling better.
Sid and his friends learn about a bunch of different ways they can all stay healthy.
Sid learns all about how wheels work when his toy truck breaks down and simply taping the wheel back on doesn't make it roll again.
Sid has to get his huge stuffed dinosaur up on his bed but he can't lift it, so he learns all about how an inclined plane can help him do the job.
Sid invents a new machine to help him put his toys away, but it turns out he's just made a lever, which has a lot of different uses he learns about.
It's a long way up to Sid's tree house, so he learns about how a pulley can help get a big box of his toys all the way to the top.
Sid and his friends want to help a stuffed panda get to the top of a slide, so they use a variety of simple machines to get the panda to its destination.
When Sid hears a barking dog, he wonders what the pup is trying to say. Sid then learns that animals communicate in all kinds of ways.
Sid's disappointed that there aren't any birds living in the birdhouse he built with his dad, but he learns that many animals build their own homes.
Sid and his friends learn all about dirt: how it helps things grow and how it serves as a home for all sorts of critters.
Sid wants to learn everything about leaves, so he finds out about how they provide food for animals and nutrients for other plants and flowers to grow.
On Bug Club Day, Sid and his friends use magnifying glasses to get an up-close look at all kinds of bugs like ants and caterpillars.
Sid learns all about where rain comes from and how it's good for us when a showery day forces him to move his outdoor play date inside.
Sid doesn't like having to put sunblock on when he's outside playing soccer with his dad, but he learns that it's the best way to protect his skin.
It's warm where Sid lives, but for the holidays, he's visiting relatives who live in cold weather. He wonders why temperatures are different there.
Sid's upset when someone comes and ruins the pile of leaves he raked. Then he learns it wasn't a person -- it was the wind!
Sid thinks being a weatherperson means he can control what the weather will be every day but then learns that's not really true!
Sid makes his mom French toast for breakfast and wonders what his body's trying to tell him when his stomach growls.
When he laughs so hard at a joke that his face hurts, Sid learns about muscles and how he has them all over his body.
Sid breathes really hard and fast when he runs around, and he wonders what's happening to all that air when he breathes it in.
Sid tries to scratch his ear with his foot after watching his dog do it. He can't, of course, so he wants to find out why.
Sid learns all about his brain and how it controls everything he does, like thinking, eating, walking and talking.