Now you can nano-size your very own dinosaur. With these micro-sized building blocks, 3D models take shape right beneath your fingertips! With 150 assorted pieces, create a detailed replica of a Stegosaurus that fits perfectly in the palm of your hand. The Stegosaurus finished size is 2" h x 1.25" w x 4.5" d. Includes detailed color instructions. Definitely not designed for children under the age of 8 years since the pieces are very tiny. Level of difficulty on this one is a 2 - with "5" being most difficult.