A Long Winter's Nap - Sally and Nick are so excited to go ice skating tomorrow, that they can't fall asleep! Cat's friend Boris the bear can help! Off they go to the Gleep-sneep Woods to learn how Boris gets ready to take his long winter's nap. Back at home, Nick and Sally follow Boris' advice, and follow their own bedtime routine to get ready for bed. With the help of a bedtime story from Cat, they quickly fall asleep. The Tree Doctor - Sally's little maple sapling hasn't grown any bigger! To discover why, the Cat in the Hat takes the kids to meet Dr. Twiggles. With the help of the tree doctor and his songs, Nick and Sally discover how trees "eat"; - through their leaves and roots. They also learn that trees grow verrrry slowly. A few more years and their maple sapling will grow into a maple tree!

Thump - Nick is trying to make his mother a surprise lunch, but she keeps coming into the kitchen! If only there was a way for him to know when she was coming. The Cat takes Nick and Sally to meet his friend Twitch the rabbit. Twitch and her bunnies teach Nick and Sally how to stop, look and listen for danger. Now Sally that can warn Nick when his mom is coming, they're able to surprise her with lunch! Squirreled Away - Nick can't remember where he put his yoyo. Cat offers to take the kids to meet his friend Bucky the squirrel who is good at both hiding and finding things! Nick and Sally learn how to use landmarks to help them remember where they put things. Back at home Nick, thinking like Bucky, is able to track down his yoyo!

Chasing Rainbows - The kids are painting a picture of a rainbow but can't remember all the colors to use. Luckily for them, Cat takes them to Color-ga-lore to meet King Kaleidoscope, an expert on rainbows! A musical number teaches them the proper color order, and a silly spray of water leads them to discover how to make their very own rainbow! Follow the Prints - Nick and Sally are enjoying a backyard picnic when they discover their last strawberry has gone missing! Who could have taken it? Cat's friend Cluey Looey can help them! They are off to Muddyfeet Waterhole where they learn about how the differently shaped feet, paws, or hooves of various animals make differently shaped footprints. Back home, they follow the prints and discover their strawberry was taken by a squirrel! Luckily, the Cat has some more!

When Nick's magic trick causes his toy car to disappear under the porch, the Cat takes them to Arcade Island to win a Grasper-ma-clasper. Instead, they find out the magic of bumping things around. The kids want to make a great snowman but the clothes they've chosen are frozen in the ice and snow. Cat takes them to Coldsnap Island, where they discover that when they warm up ice or snow it becomes water.

Jump! - Nick and Sally can't jump high enough to get their balloon that is stuck up in a tree. Good thing The Cat knows some of the best jumpers ever! Off they go to Jumpalaroo to learn how to jump from nature's masters: grasshoppers, a kangaroo, and even a flea! Slow Down for Sloths - Nick and Sally are trying to draw a picture of a butterfly but can't get close enough to see it. Cat takes them to meet Onslow the Sloth, who teaches the kids that when you slow down, the world comes to you. After lots of practice (and a race to see who's the slowest!), Nick and Sally are now able to get closer to the butterfly and finish their picture!

Incredible Journey - Nick and Sally are playing in their homemade Thingamajigger, when the Cat arrives to take them on a real adventure! Off they go to meet salmon Sam, who is returning to the pool where she hatched so she can lay her eggs. With the help of the Subber-e-blubber, they follow Samantha underwater, upriver on her incredible journey! Bamboozled - Sally needs to find a gift for her stuffed panda, Pammy. Who better to ask than a real panda? The Cat takes them to meet Zhu Zhu, a giant panda who helps the kids to discover all the wonderful things you can do with her favorite food, bamboo. Bamboo turns out to be a perfect gift for Pammy!

When Nick's water glass suddenly falls over without anyone touching it, Cat comes to help them solve the mystery. They go to The Great Causeway and discover the world of cause and effect. Nick and Sally are playing musical instruments and notice that Fish's water is rippling. Why? Cat takes them to the Jingly Jungle for a concert by the great Vibrato. They discover that sound and vibration go together.

Sally thinks that the three sticks she has aren't enough to make anything. Cat takes them to a place where they can get more sticks. And along the way, they discover just how many things you can do with three sticks. When Nick drops the mailbag into his train set, his fingers are too big get it out. Cat shrinka-ma-doodles them so they're small enough to be in the train set. But when the Thinga-ma-jigger falls out of reach, they need the right sized tool to help them out.

When Nick's magic trick causes his toy car to disappear under the porch, the Cat takes them to Arcade Island to win a Grasper-ma-clasper. Instead, they find out the magic of bumping things around. The kids want to make a great snowman but the clothes they've chosen are frozen in the ice and snow. Cat takes them to Coldsnap Island, where they discover that when they warm up ice or snow it becomes water.

Sally invents a secret treehouse handshake, but Nick can't remember the sequence. The Cat takes them to Over-and-Overton, where they figure out how to get through a series of obstacles by recognizing patterns. Nick and Sally don't understand why one toy car goes faster than another. The Cat says he needs their help to move some big pictures and along the way, they find out about how air is matter (takes up space and has mass) and can push on objects.

Sally keeps getting found when they play Hide and Seek. Cat takes them to Tagaloo to meet a great seeker. They keep trying to catch up to the elusive Tagaloop, and along the way they find out that they can use more than their sense of sight to find things. Sally loses her special bead in the sandbox and they can't find it. Cat takes them to the Hole-Lot-of Funhouse, where they have to make their way across different floors without falling through. Along the way they discover how the size and shape of materials can be used to sort or filter different materials.

Nick and Sally's soccer game is obstructed by a large log that they can't lift out of the way. In Machine-a-ma-zoo they discover that there's a much easier way to move that log than by lifting it. Nick's new plane is flying well but is a little dull so the kids add buttons and glitter but then they don't understand why the plane isn't flying as well as it did. In Odds n' Endsville, they discover that there can be too much of a good thing, and sometimes keeping it simple is the best solution.

Sally is convinced that a tall thin glass of juice holds more than a short wide glass so Cat takes them to Point O'View where they learn that getting evidence can cause them to change their mind. Nick and Sally wonder if they can walk on a cloud, and the Cat takes them to Mount Knowmore. As they climb, they discover that materials have different properties that allow them to be solid or fluid. And when they get to the top, they have gathered enough evidence through experience of walking through the clouds to answer the original question.

Nick and Sally can't agree on the "right" way to sort their toys. The Cat takes them to Toborrowland to help him return a bunch of things. As they confront different obstacles, they have to come up with different ways of sorting Cat's things, and they realize there are lots of ways to sort. T The kids are making bubbles and want to save one for Sally's mom. But they always pop. In Odds-n-Endsville they find out that landing bubbles on some surfaces helps the bubbles last longer.