Nick and Sally are trying to build a sandcastle but the sand is either too dry or too wet. Cat takes them to see the Song Flower Sisters, who need just the right mixture of water and soil before they'll sing. Through multiple trials, Nick and Sally learn the importance of recording procedures and of perseverance as they find the right mixture for the flowers. Sally wants to make a mobile balance with four identical rubber ducks, but she's only got three. Cat takes them to The Bazaar at Balance Point, where the Things throw everything off balance. Sally discovers that weight and size are not always equivalent and that there are many different ways to balance objects.

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!

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.

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!

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!

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.

Surprise Surprise - Try as they might, Nick and Sally just can't learn to do a somersault. Luckily Cat's friend Luis the Armadillo is the king of the roly polys! But when they find Luis, they learn that he only rolls when he gets surprised. They take turns trying to surprise him, and when they finally do, they're the ones surprised when they learn that not only can Luis roll, but he can even run underwater! Back at home, they follow Luis' advice and are now able to somersault! A Howling Good Time - Nick and Sally are pretending to be lost adventurers when Sally wonders what to do if you really do get lost. The Cat in the Hat knows a wolf pup who knows all about getting lost and found! In the Hooty Howly Woods Grayson shows them how wolves howl to communicate and to find each other. Now Sally and Nick know one thing to do if they get lost - howl for mom!

Be Cool - Phew, it's hot outside! How are Sally and Nick going to stay cool? Cat suggests that they should visit some friends in the Dizzle-dazzle Desert to learn how to keep cool. They learn that some animals are light coloured, some stay out of the sun, and some, like Tommy the coolest toad around, just mooove sloooow. Nick and Sally take their advice, but Cat has an even better idea - run through a sprinkler! Elephant Walk - When building a toy construction set, Nick and Sally wonder if there's such thing as a one-thing-does-it-all tool. Well, the Cat knows just who to visit to find out - Themba the African elephant! Themba, and her daughter Efia, show the Cat and the kids all the different things their trunks can do. Nick and Sally realize that elephant trucks are just like hands, so they already have a one-thing-does-it-all tool!

Secret Super Digger - Sally is trying to grow a flower for her mom, but it just won't grow. Time to see Finola! At Finola's Farm, she introduces Cat, Sally and Nick to her secret super digger - Diggery the earthworm. Diggery shows them how plant roots need water air and compost, which Diggery helps to make. Sally's flower is sure to grow once she gets some of her own secret super diggers to help! Pucker Up and Blow - Nick and Sally are trying to whistle but they just can't seem to get it right! The Cat takes them to visit his friend, Rocky the Winter Wren, who is an expert whistler. Rocky, and his son Ricky, offer this advice: if you want to whistle, start with one note and practice.

Flutter By Butterfly - Sally and Nick are pretending to be butterflies, but they're not very good at it. The Cat takes them to meet Bernadette the Monarch butterfly, who can teach them all about fluttering. Following Bernadette from Milky Weed Meadow to Prickly Pines forest they learn that butterfly wings are used for so much more than just fluttering! Pretty in Pink - Sally and Nick are having fun trying out different moves when the Cat arrives to show them some cool moves of his own. He learned them from Pinkie the flamingo. The kids want to learn too, so off they go to Gooney Goon Lagoon! There they learn all about flamingos - fun moves and all! Back at home Cat, Nick and Sally all move together... the flamingo way!

Sniff and Seek - Nick's most favourite smell is chocolate chip cookies! But what is Sally's? She's not sure. What better way to find out than by playing sniff and seek with a skunk! Cat introduces Nick and Sally to Whiffy, and in the adventure of finding Sally's favourite smell they discover how good Whiffy is at protecting himself with his very own special smell. Aye Aye! - Nick and Sally are making Halloween masks, but they want to make them really scary. Cat takes them to meet Aiya, the Aye Aye, in the forest of Spookywoowoo. Aiya shows them, that even though he may look scary - his big ears, huge eyes and long fingers help him to find food. And now Nick and Sally know just how to make their masks scary!

Teeny Weeny Adventure - Nick has spotted a tiny ladybug, but Sally has found an even smaller ant! And there's nothing smaller than an ant. Or is there? Cat takes Nick and Sally to meet a variety of single-celled creatures, the smallest anywhere! Nick and Sally soon learn that a drop of water holds a whole lot more than they ever realized! I See Seeds - Sally and Nick are going on an adventure, but how are they going to get there? Skateboard? Train? Rocketship? They just can't decide, until Cat suggests they see how trees send their seeds on trips. They follow different seeds as they travel through the air, float on the water and hitch rides on animals.

Blue Feet Are Neat - Nick and Sally are trying out their new blue rubber boots but they keep getting stuck in the mud! Cat knows just who can help them - Buster, the Blue-footed Booby bird. Buster is only too happy to show them how his wide, flat blue feet help him move easily over the muddy shore. With Cat's help to make their boots wide and flat, Sally and Nick can now walk across the mud without getting stuck - just like Buster! Reef Magic - Nick has difficulty learning a "disappearing" magic trick, when who should appear but The Cat in the Hat! He takes Nick and Sally to the coral reef of Scoobamareen. There they learn that distraction is a great way for some sea creatures to hide themselves from other fish who might be looking for a bite to eat. Back at home, Nick and Sally use what they learned to make their stuffed panda disappear!