Get ready to learn all about inclined planes in this fascinating new book! See inclined planes at work in ramps and roller coasters, as well as their other applications and history. Kids get… More →

Levers play an important part in all our lives! Without them we could not row a boat, move a wheelbarrow, or open a bottle. This book teaches children about the different kinds of levers.… More →

Pulleys help make up some of the most complicated machinery, from car engines to cranes. See how pulleys lift and move heavy things, how pulleys work together, and the different kinds of… More →

Screws are everywhere! From the cap on a bottle to a farmer's combine, screws help us lift, grip, squeeze, and move. Come inside the book to learn all about this fascinating simple machine. More →

Simple machines are all around children: bicycle wheels, doorstops, the seesaw on the playground. This captivating series from Crabtree opens young readers' eyes to the essential everyday… More →

Wedges are used to separate, lift, or hold things in place. One of humankind's most ancient tools, the wedge has a place in almost everyone's daily life. Learn more in this absorbing new title. More →

Read all about wheels and axles and their many uses in this new book. Children will be thrilled to learn of their many uses, from doorknobs to the insides of a clock. There are wheels that… More →

How does something enormous suddenly disappear? Readers will be amazed by how frequently large ships are lost without a trace. But sometimes it is just the crew that has disappeared. Get the… More →

Can you imagine life without light? Well, actually... it's impossible, because without light there would be no life on Earth at all! Learn all about the most disgusting and dreadful aspects… More →

People spend more time looking through glass than thinking about how it is made. Glass shows readers what it takes to make glass, as well as the part glass plays in our daily lives.… More →