5 years & up. Give your kid a head start in creating and building! Promote your child's development of STEAM (science, technology, engineering, arts, and math) concepts by lighting their natural curiosity and creativity. Your child will learn the basic principles of building and bring their creations to life with this educational toy that promotes skill development and allows the creation of three-dimensional models. This set includes newly designed parts - a barbell shaped rod that easily sandwiches between 2 connectors, and a flat panel piece that provides structural support. Specifically designed for younger builders who can build 2 flat shapes and connect them together into a 3-D creation. Young builders will also enjoy the newly designed wheels that easily pop right on. This set contains 141 parts and easy-to-follow, step-by-step building instructions and ideas for 40 different models.