Snap Circuits® Motion contains over 50 parts and over 165 projects to complete -- all projects focused on concepts of motion and physics. Experiment with gears ratios using various gears and pulleys. Experiments include: Color changing lighted fan, air "fountain", motion detector and so much more! Fun projects let kids learn while they play! With its easy-to-follow instructions, Snap Circuits® gives your child a hands-on education to discover how electrical circuits -- like those found in everyday devices kids are familiar with -- function and operate. They'll also gain valuable lessons in building and following instructions. The project manual includes large color illustrations and simple directions for each project.