No batteries required! Learn about mechanics by building real moving toys that run on solar energy.nAll you need to construct these items are included in this kit. When completed, watch them move, roll, walk, spin, create optical illusions and more!nHousehold recycled materials can be adapted to turn your creations into a dinosaur or monster with its own personalitynGive the gift of science with toys and gadgets that foster curiosity and encourage scientific learning. Recommended for ages 3 and up. Challenge your child's imagination with this Value 3-Pack.