Grades: 1-5 Time: 7 projects; 20-30 minutes each SIMPLE MACHINES AND FORCES is an amazing book full of hands-on activities. Learn about simple machines and forces by building them; using easy materials from around the house or stores. Fun with Science, Technology, Engineering, Art and Math project ideas. It is a great way to acquire 21st century skills and STEM learning. Inside this book you will find projects on: Pulley Seesaw, Merry go-round Shoebox Projector Zip line and many more Build your own Simple Machines and learn about forces!