The Cat in the Hat Knows a Lot About That!

Nick is in pursuit of finding out how to build a drawbridge. In Spansylvania, they meet a dragon who's in pursut of them - and along the way they find out that some materials are better suited for bridges than others. / When Nick and Sally's boat sinks, 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.

When Sally 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 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. / The kids want to get a trunk up into the treehouse and go to the Machine-a-Ma-Zoo where they're introduced to some simple machines, but learn about the pulley.

Nick loses Sally's bouncy ball. They go to Ballaballo and learn how different balls are made of different materials that make them bouncier. / Nick and Sally are having a sleepover, Nick is startled by a shadow. The Cat explains that shadows aren't scary if you know what they are. He takes them to Shadowland where they learn about how the position of the light can make shadows grow or shrink.

Nick and Sally need a strong piece of string to pull their train, but it breaks. The Cat takes them away, but the TMJ malfunctions and they have to make an unscheduled landing. / Nick and Sally notice a bird flying back and forth in the tree branches. The bird is building a nest and they want to get a closer look. The Cat takes them to a mirror world where they learn how reflections work.

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 a magical magnets world where they learn how poles attract or repel. / Nick is trying to learn how to ride his bike and in Balencia, he discovers the things to keep in mind when you're trying to maintain your balance.

When Nick's favorite flyer gets stuck in the tree, Nick wishes he could jump really high and retrieve it. Cat takes them to Gravity Drop where they discover what happens when there's more or less gravity. / Sally wants to fly her kite but can't seem 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.

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 wants to create a new home for the cricket in their backyard. The Cat takes them on a journey but has to make an emergency landing on Lagoona-Maroon where they discover what they really need when making a shelter.

Sally is trying to make a vase for her mother but each one she tries falls over. Cat takes them to Blueprintia and they discover what they can learn by designing before building. / 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 an arcade where they discover what will and won't be attracted to a magnet.

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. / 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 about levers.

Sally keeps getting found when they play Hide and Seek. Cat takes them to Tagaloo to meet a great seeker. Along the way they find out that they can use of 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, along the way they discover how filtering works.

When Nick's magic trick causes his toy car to disappear under the porch, the Cat takes them to Arcade Island to win a Gasper-ma-clasper. But instead they find out the magic of bumping things around. / The kids want to make a 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 snow it becomes water.

The kids are making bubbles and want to save one, but they always pop. In Odds-n-Endsville they find that landing bubbles on some surfaces helps the bubbles last longer. / Nick and Sally can't agree on the "right" way to sort their toys. Cat takes them to Toborrowland to help him return some things. They come up with different ways to sort Cat's things, they realize there are many ways to sort.

Nick and Sally are playing musical instruments and notice that Fish's water is rippling. Cat takes them to the Jingly Jungle for a concert by the great Vibrato. They discover that sound and vibration go together. / When Nick's water glass 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's soccer game is blocked by a log they can't lift. In Machine-a-ma-zoo they discover there's a much easier way to move that log than by lifting it. / Nick's new plane is flying well but is dull so the kids add buttons and glitter making the plane not fly as well as it did. In Odds n' Endsville, they discover that sometimes keeping it simple is the best solution.

Sally thinks that three sticks aren't enough to make anything. Cat takes them to a place where they can get more sticks, along the way, they discover just how many things you can do with three sticks. / When Nick drops the mail bag into his train set, his fingers are too big get it out. Cat shrinkamadoodles them so they're small enough to be in the train set.

Nick and Sally wonder if they can walk on a cloud, and the Cat takes them to Mount Knowmore. As they climb, they discover hard surfaces and watery surfaces and walk through fog. / 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 don't understand why one toy car goes faster than another. The Cat says he needs their help, and along the way, they find out about how to make things more aeordynamic. / Sally invents a secret treehouse handshake, but Nick can't remember the sequence. 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 are disappointed when their toy runs out of power. The Cat takes them to Lots-o-Lakes Land, but along the way the Thingamajigger runs out of Go-Go-Go juice and they have to find other ways to make it go. / Sally and Nick have wrapped gifts but the kids can't tell which is which. Cat takes them to Zippy Zaroo's Cookie Factory when the shrunken Thingamajigger ends up inside a cookie.

Sally wants to make a perfect mobile with four identical rubber ducks, but she's only got three ducks. Cat takes them to The Bazaar at Balancia Point, where everything is in balance. / 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.