Little dino lovers can enjoy hours of creative play by piecing together their very own stegosaurus or T. rex. Smooth wood pieces and special rotating magnets make the models easy to build. T. rex: 4" long x 3.5" wide x 4" high Stegosaurus: 5" long x 3.5" wide x 4" high Made from quality beech wood with a nontoxic finish. Made with simple shapes and a unique, "rotating magnet technology." Kids can mix and match multiple dino pieces to create their own prehistoric species. Ages 3 and up.