Seasons - Spring and Summer - For Show and Tell at school, Nick and Sally must bring something from their favourite season. But how can they choose which is their favourite? The Cat in the Hat takes them to the magical Garden of Seasons, where they can visit any season they like, any time they like! They meet three young animals and journey with them as they begin to grow up. Sally decides that she has two favourite seasons, and with the pictures taken from the Snaparama camera, she now has a scrapbook of pictures to show why! Seasons - Fall and Winter - It's Nick's turn to choose a favourite season. Back to the Garden of Seasons to visit Fall and Winter! In Fall, they meet up with their friends from Spring and Summer to have a going away party for Candy the goose who's about to fly south. In Winter, they have a great time playing with Sam the hare while all his other friends hibernate. Nick can't decide on just one season, so he makes a picture of all the fun they had in both seasons!

Super Cleaner Upper: Nick and Sally are cleaning up the backyard when they come across a yucky apple core. Who's going to pick it up? The Cat in the Hat takes them to meet the best cleaner-upper there is, Sandy the Sand Hopper! Sandy teaches them the difference between natural "garbage" and man-made trash, and how some animals use the natural garbage as food. Back at home, they put the trash in a garbage bag, and the apple core in the garden for Wriggles the worm to enjoy! Itty Bitty Water - Nick and Sally are about to dump out the water in their kiddie pool when The Cat stops them - water is too precious to waste even a drop! Off they go to the Drippety Dry Desert to meet three creatures who are experts at conserving water. Back at home, they think of other ways to use the water in the pool instead of just dumping it out - like giving Cat a bath!

Nick and Sally need a strong piece of string to pull their train, but it breaks, and they don't have anything stronger in their craft box. The Cat takes them away, but the Thinga-ma-jigger malfunctions and they have to make an unscheduled landing. It turns out they've shrunken and are inside the craft box, where they discover that they can create a stronger string by braiding several strands together. Nick and Sally are in the treehouse making funny faces at themselves in the mirror when they notice a bird flying back and forth into the tree branches. They discover that the bird is building a nest and they want to get a closer look but can't do it without disturbing the birds. The Cat takes them to a mirror world where they learn how reflections work and they concoct a kind of periscope that allows them to watch the bird without disturbing it.

Nick and Sally are having a sleepover in the treehouse and Nick is startled by a shadow. The Cat explains that shadows aren't scary if you know what they are. He takes them to Silhouette Valley where they learn that shadows are made by blocking light and the position of the light can make shadows grow or shrink. Nick unintentionally loses Sally's bouncy ball. They go to Ballaballo and learn how different balls are made of different materials, which help them move in different ways.

Nick wants to create a new home for the cricket in their backyard, but the cricket won't go in. The Cat takes them on a journey but has to make an emergency landing on Lagoona-Maroon, where they discover what they really need to consider when making a shelter. Nick and Sally are frustrated by a puddle that always forms at an inconvenient spot on the sidewalk. They go to a water park and learn that water always seeks the lowest level.

Nick gets some new train cars for his train set and wants to add them to his train, but the magnets won't connect. The Cat takes them to the Magnetic Fields where they learn how magnets work. Nick is trying to learn how to ride his bike so the Cat takes him and Sally to Balence Point, where he discovers the things to keep in mind when trying to maintain your balance.

When Nick and Sally's boat sinks, they need to build another boat, but don't know how. A trip to Floating Island helps them discover that, along with needing the right material, you also need to make the shape of your boat float. Nick is in pursuit of finding out how to build a drawbridge. In Spansylvania, they meet a dragon who chases after them - and along the way they find out that some materials are better suited for bridges than others.

When Sally accidentally destroys Nick's model of a mountain, the Cat takes them to meet Sara of Serendip, an inventor who helps them understand that you can make new discoveries through your mistakes. Nick discovers that Sally can't hear him when he yells from his bedroom window if their bedroom windows are closed. The Cat takes them to the Soundy Sea and they learn that sound travels in waves.

Sally wants to fly her kite but can't seem to work out the timing to get the wind right - after all, you can't see wind. The Cat takes them to Windnasium where they learn to "see" wind in all kinds of ways. When Nick's favorite flyer gets stuck in the tree, Nick wishes he could jump really high and retrieve it, but gravity holds him down. Cat takes them to Gravity Drop where they discover what happens when there's more or less gravity. And Nick figures out how to use gravity to get his plane back.

The kids want to get a trunk up into the treehouse and go to the Machine-a-Ma-Zoo, where they're introduced to simple machines, and learn about the pulley. Sally loses her "slidiness" and when they go to the Frictionarium, they find out that there's a force called friction that can stop a person from sliding.

Show Me the Honey - Sally and Nick have run out of honey! Luckily the Cat knows just where to go to get more. They visit Queen Priscilla Buzzoo who invites them to join in the bee dance to learn how to make honey. Migration Vacation - The purple martin swallow that lives in Sally's backyard has gone missing! The Cat, with the help of a variety of forest creatures, help Nick and Sally track down the bird, and learn how and why birds migrate.

I Love the Nightlife - Nick wants to stay awake all night. Good thing the Cat needs help finding his most favorite hat that he lost in the forest of Wagamaroo! The Cat takes Nick and Sally on a nocturnal adventure, along the way meeting a variety of animals who stay up all night! Oh Give Me a Home! - Nick has a super duper special shell and Sally wants one too! The Cat in the Hat takes them to a beachside adventure where they meet Tucker, a hermit crab who is also looking for a new shell because he's grown too big for his. An under the sea fashion show gives both Tucker and Sally super duper special shells!

Sally is trying to make a vase for her mother but each one she tries falls over. Cat takes the kids to Blueprintia where designs become real. They discover what they can learn by designing before building, which helps Sally make the vase back at home. The kids are creating a game that involves "fishing" for prizes, but they can't "catch" any of the prizes. The Cat takes them to Arcade Island where they discover what will and won't be attracted to a magnet.

A Plan for Sand - Nick and Sally are playing in their sandbox, but there's not enough room for them to build their castles. The Cat arrives to take them to the biggest sandbox they'll ever see! In the desert, they meet Carmela the Camel who teaches them about how camels are adapted to live in the dry, sandy climate. Whale Music - Nick and Sally have made a song to sing to their moms, but they can't get the ending quite right. The Cat in the Hat takes them to meet the best singing teacher in the world, Humphrey the Humpback Whale! While bobbing in the ocean, Humphrey teaches the kids that whales communicate by singing, and that it's not how you sing that matters, but what you're saying in the song. The kids return home to delight their mothers with their song!

Dress Up Day - Nick and Sally are playing dress up, but oh no! Sally's princess dress has torn, and mom doesn't have any silk thread to fix it. Cat takes them to his good friend Mindy, the silk caterpillar. Mindy shows them how she makes silk. Sally uses the silk thread to fix her swirly twirly princess dress! Bathtime - Nick and Sally have been playing in the mud, and now they need to get clean! The Cat in the Hat knows some friends who have some very wonderful ways to bathe! In Bana Bana Savanah, they meet three different animals who all keep clean in very different ways. Even though it was fun to try bathing how the animals do, Sally and Nick decide that good old soap and water works best for them!

The kids need to move a big rock in their backyard so they can plant an apple tree. The Cat takes them to Machine-a-Ma-Zoo, where they learn how a lever can solve their problem. Sally is playing a song on an instrument made up of different things in the Treehouse but she can't find the right note for her song. In Gongolia, they find out that bigger things make lower sounds and smaller things make higher sounds.

Many Ants Make Light Work - Nick and Sally are trying to put up a tent in their backyard but it's not working! Nick is pulling when Sally is pushing and it's just making a giant heap! Good thing the Cat knows a million trillion friends who are experts at teamwork! He whisks the kids off to visit an ant colony where Nick and Sally learn that you can do anything when you work together! Nest Best Thing - Nick and Sally have found some bird eggs in their backyard, but their nest is destroyed. Where are they going to keep them? The Cat in the Hat brings them to an expert nest builder, Mrs. Robin, who shows the children how to build a nest especially for those robin eggs.

Trees Company - Sally and Nick are playing up in their treehouse when Nick's mom calls them for lunch. Nick wonders what it would be like to stay up in that tree all the time! The Cat in the Hat knows! Or at least he has friends that do. In Jimmer Jammer Jungle the kids learn how different animals spend their entire lives in trees. As neat as that is, there's one thing those trees don't have, and that's mom's home cooking! Now You See Me - Nick and Sally are playing hide and go seek, but Sally keeps getting found! The Cat takes the kids to meet the best hider ever, his friend Gecko! Through a game of hide and go seek in the jungle, the kids learn how Gecko not only hides, but how he runs and climbs. Now Sally knows how to camouflage herself so she won't be so easily found!

Flower Power - Sally's mom has a cold, so Sally wants to pick her some colorful flowers to make her feel better. The Cat in the Hat takes Nick and Sally to the forest of Flora-Fah-Zoom where they meet three different creatures that all depend on flowers to live. Sally decides to make her mother a picture of their adventure in Flora-Fah-Zoom instead of picking a flower that animals need in order to survive. Snowman's Land - Sally and Nick have just finished making a statue of the Cat in the Hat out of snow, but he's starting to melt! Good thing Cat knows where to take the melting snowcat: to the cold and snowy north! In the arctic, the kids skate on a frozen lake, make snow sculptures, and learn that water can freeze and melt when it's cold or warm outside. Because it's getting warmer back home, they leave their snowcat sculpture there so they can come back and visit him!