Recommended Age 24 mos. - 6 yrs. / Toddler - 1st gr. Description Kids go crazy for these magnetic builders! The colorful 30 wacky shapes stick to each other thanks to the magnets inside. Just link up wheels, tubes, a propeller and more to create robots, helicopters, real-rolling vehicles and anything else little engineers can dream up! Largest piece measures 5 1/2" in length. Wonderful for open-ended play as well as building fine motor skills, visual spatial reasoning, early STEM, creativity, etc. Complete set and comes with box. Box and inspiration sheet are very worn but the builders themselves are like new condition (classic Lakeshore quality - very durable).