Build 20 different dinosaurs including T-Rex, Stegosaur, Triceratops, and Pterodactyl. (Go online and learn how to build 16 more.) Then watch them glow—and make them roar and growl. A light-up sound module comes pre-loaded with dinosaur sounds. A great STEM (Science, Technology, Engineering, Math) toy for all ages, kit includes 15 LED pegs, 403 tinted construction bricks, power base, button batteries, and instructions. Ages 8-14.