Nick and Sally can't find their sled that's buried under the snow. Cat's friend Magnus the reindeer is great at finding things in the snow. Off they go to the Jingly Bell Forest where Magnus shows them how he digs with his feet and shovels snow with his antlers. And when Nick and Sally find Magnus's old antlers, they can shovel snow too and find their sled!

Nick and Sally are playing soccer when their ball goes through a hole in their net. Luckily the Cat's friend Mabel is a spider who knows all about weaving - maybe she can help them! Mabel, with the help of Cat and a song, teaches Nick and Sally how to weave a web. Back at home, they use Mabel's advice and fix their net—just in time for Cat to score a goal!

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? The Cat takes Nick and Sally to meet a variety of single-cell creatures, the smallest anywhere! Nick and Sally soon learn that a drop of water holds a whole lot more than they ever realized.

Sally and Nick are going on an adventure, but how are they going to get there? Skateboard? Train? Rocket ship? They just can't decide! Until the 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.

Try as they might, Nick and Sally just can't learn to do a somersault. Luckily the 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 also can run underwater! Back at home, they follow Luis's advice and are now able to somersault!

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 introduces them to a wolf pup named Grayson 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!

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!

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.

Nick's most favorite 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! The Cat introduces Nick and Sally to Whiffy. During the adventure of finding Sally's favourite smell, they discover how good Whiffy is at protecting himself with his very own special smell.

Nick and Sally are making Halloween masks, but they want to make them really scary. The Cat takes them to meet Aiya the aye-aye in the forest of Spookywoowoo. Even though Aiya may look scary, his big ears, huge eyes, and long fingers help him to find food. Now Nick and Sally know just how to make their masks scary!

Nick and Sally are trying out their new blue rubber boots but they keep getting stuck in the mud! The 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. The Cat helps to make their boots wide and flat, and now Sally and Nick can walk across the mud without getting stuck—just like Buster!

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 that might be looking for a bite to eat. Back at home, Nick and Sally use what they learned to make their stuffed panda disappear!

Phew, it's hot outside! How are Sally and Nick going to stay cool? The 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!

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 trunks are just like hands, so they already have a one-thing-does-it-all tool!

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!

Sally and Nick are having fun trying out different moves when the Cat arrives to show them some cool moves of his own that Pinkie the flamingo taught him. The kids want to learn the moves too, so off they go to Gooney Goon Lagoon! There, they learn all about flamingos—fun moves and all! Back at home the Cat, Nick, and Sally all move together the flamingo way!

Nick and Sally are exploring how deep they can dig in the sandbox. The Cat arrives to whisk them away to the deepest place he knows—the bottom of the Swirly Whirly Ocean! They meet up with Aurilia the angler fish who guides them to the very bottom of the ocean floor.

Nick and Sally are excited to jump in the giant puddle in their backyard—but it's gone! Where did it go? With the help of the Cat's camera, they see that the puddle has turned into water vapor. Off they go into the Bluey Blue Sky to follow the water that was in their puddle. They discover that water vapor rises into the sky, then cools off, and falls as rain. When they return home, they are delighted to see that their puddle is back

It's Fish's birthday and Nick and Sally want to get him a special present, but whom can they ask for ideas? They're off to the Briny Blue Sea where Gari the garibaldi fish introduces them to the creatures in a kelp forest that use the kelp for both food and protection. Back at home they make a picture of the kelp forest for Fish.

Nick and Sally are playing when their ball gets caught up high in the branches of a tree. Oh, how they wish they were tall! Being tall is something the Cat's friend Treetop Tom knows all about. They meet the giraffe in the So Sunny Savannah, and with the help of the Cat's "tallerizers," Nick and Sally get as tall as Tom! Back home, the Cat uses stilts to get their ball out of the tree.