On a hot day, Peg and Cat start a business selling lemonade and run into all sorts of problems.

Peg and Cat decide to open a pizzeria using Peg's knowledge about fractions to best serve the customers.

A rainy day in the park has Peg and Cat singing, dancing, and measuring puddles to find out which ones are perfect for jumping in. Splash! It’s a rainy day, which is good news for Peg and Cat, who can’t wait to get outside to splash in the puddles. With their rain boots, raincoats, and umbrellas, they’re all set for the puddles in the park. Peg jumps right in, but Cat isn’t so sure. Just how deep is that water, anyway? If only they had some way to measure how far down the puddles go! A clever idea from Peg might just hold the solution to Cat’s puddle problem in this engaging story, which comes with bonus stickers.

It's a hot day, so what could be cooler than setting up a lemonade stand? When Peg needs some marbles to keep her special marble company, she and Cat decide to sell lemonade in exchange for ten marbles a cup. But the Teens have other ideas.

What goes up must come down — somehow — as Peg gets stuck high in a tree and Cat and Ramone try to come to the rescue. Peg has a BIG PROBLEM. She is up in a tree with her yo-yo and can’t get down! Luckily, Cat is down below and eager to help. He finds two long poles and some short pieces of wood and ties them all together. But when his makeshift ladder sways and falls, Peg has to pull Cat up, and now they have an even bigger problem. Can their friend Ramone make the ladder’s vertical sides go up and down and the horizontal steps go straight across so they can get down safely? Could Peg’s yo-yo skills come in handy after all?

When someone leaves the chicken coop open and 100 chickens escape, Peg and Cat use their math skills to solve the problem.

Journey through the beautifully hand-lettered messages by award-winning illustrator Jessica Hische. This uplifting and positive book - now a New York Times best seller - encourages kids to promise that tomorrow, they will try new things, do their best, and be brave. Tomorrow I'll be all the things I tried to be today: Adventurous, Strong, Smart, Curious, Creative, Confident, & Brave. And if I wasn't one of them, I know that it's OK. Journey through a world filled with positive and beautifully hand-lettered words of widsom, inspiration, and motivation. As this book reminds readers, tomorrow is another day, full of endless opportunities--all you have to do is decide to make the day yours. "Jessica Hische, one of the great designers and typographers, now shows herself equally adept at creating gorgeous and immersive images for young readers. This is a joyous burst of color."--Dave Eggers, author of Her Right Foot