The Cat in the Hat Knows a Lot About That!

When Nick and Sally's boat sinks, they need to build another, but they don't know how. A trip to Floating Island helps them! (S3, ep 1)

Nick, trying to find out how to build a drawbridge, meets a dragon - and, along the way, finds out some materials are better suited for bridges than others! (S3, ep 2)

Accidents Happen If You're Lucky: When Sally accidentally breaks Nick's model, the Cat takes them to Sara of Serendip, who helps them make new discoveries through their mistakes. (S3, ep 3)

Nick discovers Sally can't hear him when he yells from his bedroom window. The Cat takes them to the Soundy Sea, where they learn that sound travels in waves. (S3, ep 4)

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. (S3, ep 5)

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. (S3, ep 6)

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. (S3, ep 7)

Nick unintentionally loses Sally's bouncy ball. They go to Ballaballo and learn how different balls are made of different materials so they move in different ways. (S3, ep 8)

An unscheduled landing while searching for string leaves Nick and Sally shrunken. Then, they create a strong string by braiding strands together. (S3, ep 9)

Nick and Sally are making funny faces in the mirror. The Cat takes them to a mirror world where they learn how reflections work. (S3, ep 10)

When Nick's magnetic train won't connect, the Cat takes them to the Magnetic Fields where they learn how magnets work. (S3, ep 11)

Nick is trying to learn how to ride his bike so the Cat takes him and Sally to Balance Point, where he discovers how to keep your balance. (S3, ep 12)

Who Can See the Wind?: Sally wants to fly her kite but can't work out getting the wind right. The Cat takes them to Windnasium, where they learn to 'see' the wind. (S3, ep 13)

The Cat takes Nick and Sally to Gravity Drop, where they discover what happens when there's more or less gravity. Can Nick use gravity to get his toy plane back? (S3, ep 14)

The Cat takes Nick and Sally on a journey but has to make an emergency landing on Lagoona-Maroon! (S3, ep 15)

Nick and Sally are frustrated by a puddle that always forms on the sidewalk. They go to a water park and learn that water always seeks the lowest level. (S3, ep 16)

The Cat takes the kids to Blueprintia, where Sally's ideas become reality and they discover what they can learn through designing before building. (S3, ep 17)

The kids are creating a game that involves fishing for prizes. The Cat takes them to Arcade Island where they discover what gets attracted to a magnet. (S3, ep 18)

The kids need to move a big rock in their backyard. The Cat takes them to Machine-a-Ma-Zoo, where they learn how a lever can solve their problem. (S3, ep 19)

Going, Going, Gong: 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 tune. (S3, ep 20)

Sally keeps getting found when they play Hide and Seek. Cat takes them to Tagaloo to meet a great seeker who helps them try to catch the elusive Tagaloop. (S3, ep 21)

Sally loses her special bead in the sandbox and can't find it, so Cat takes them to the Hole-Lot-of Funhouse, where they learn about different sizes and shapes. (S3, ep 22)

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. (S3, ep 23)

The kids want to make a great snowman but the clothes they've chosen are frozen in the ice and snow. (S3, ep 24)

Nick and Sally can't agree on the "right" way to sort their toys so The Cat takes them to Toborrowland to help him return some things. (S3, ep 25)

The kids are making bubbles and want to save one for Sally's mother. But they always pop... (S3, ep 26)

When Nick's water glass suddenly falls over without anyone touching it, Cat comes to help them solve the mystery. (S3, ep 27)

Nick and Sally are playing musical instruments and notice that Fish's water is rippling. Why? (S3, ep 28)

Nick and Sally can't move a a large log that is in their way. In Machine-a-ma-zoo they discover there's a much easier way to move that log than by lifting it. (S3, ep 29)

Nick's new plane 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. (S3, ep 30)

When Nick drops the mailbag into his train set, his fingers are too big get it out, so the Cat shrinka-ma-doodles them. (S3, ep 31)

Sally thinks that the three sticks she has aren't enough to make anything, so Cat takes them to a place where they can get more. (S3, ep 32)

Mind-Changing Fun: 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 to get the answer. (S3, ep 33)

Nick and Sally wonder if they can walk on a cloud, so the Cat takes them to Mount Knowmore to learn more about different materials. (S3, ep 34)

Treehouse Handshake: When Nick can't remember Sally's new secret handshake, the Cat takes them to Over-and-Overton to learn how to recognise patterns. (S3, ep 35)

The Cat needs the kids' help to move some big pictures, and soon they find out about how air is matter and can push on objects. (S3, ep 36)

When the Thinga-ma-jigger runs out of Go-Go-Go juice, the Cat, Nick and Sally have to find alternative forms of energy to make it go. (S3, ep 37)

Sally and Nick have wrapped Father's Day gifts, but when they get mixed up, the kids can't tell which is which. (S3, ep 38)

Nick and Sally are trying to build a sandcastle but the sand is either too dry or too wet. Can the Song Flower Sisters help? (S3, ep 39)

The Cat takes Nick and Sally to The Bazaar at Balance Point, where the Things throw everything off balance. (S3, ep 40)