With super-strong magnetic force, the Guidecraft Magneatos Better Builders 100 Piece Set features a unique rod and ball configuration for unlimited design possibilities. Introduce your child to the principles of science, construction, and engineering while nurturing their creativity. The set includes a handy storage bin and 22-page activity guide which explores the science of magnets and provides sample building designs. Magnets are embedded in the rods for safety. About Guidecraft Guidecraft was founded in 1964 in a small woodshop, producing 10 items. Today, Guidecraft"s line includes over 160 educational toys and furnishings. The company"s size has changed, but their mission remains the same; stay true to the tradition of smart, beautifully crafted wood products, which allow children"s minds and imaginations room to truly wonder and grow. Guidecraft plans to continue far into the future with what they do best, while always giving their loyal customers what they have come to expect: expert quality, excellent service, and an ever-growing collection of creativity-inspiring products for children. 100 pieces provide endless building possibilities. Magnets are safely placed in oversized rods. Metal balls for a fast and sturdy connection. Includes a convenient storage bin and activity guide. Recommended for ages 2 years and up.