Do you like to make a mess? Do you like to discover how the world works? So do Peter and Mary, who want to be scientists when they grow up. Like all scientists, they enjoy doing experiments. And like you, they don't have much money so they have to use simple and inexpensive materials. Luckily for them, there are plenty of experiments that can be done using just the things found at home! This book contains their first ten adventures. Read along as they ask questions, make predictions, and then see what the answer is!In this book, Mary and Peter will discover what it feels like to be in space, how to make rainbows in the backyard, and how to do something impossible. Grab your friends and join in on the fun!