4 years & up. Explore and build endless 2D & 3D models with this easy click and connect system. Colorful translucent plastics and unique geometric shapes and extender rods allow for open-ended, creativity-inspired constructions. Integrates flawlessly with Solids and Organics PowerClix® systems. The activity guide gives young builders step-by-step instruction on how to create a variety of models while teaching them the basics of science, construction and engineering. Eight unique shapes assist with fine motor skills and spatial thinking with STEM applications.100 piece set.