These 6 triangular panels are made from sustainably cultivated European Beech wood. They're designed for use with our Rainbow Wooden Architect Triangles (# 73418) and provide a foundation for children to create their own structures and building methods. Introduce STEM concepts, spatial reasoning skills and more. The surface of these panels features a natural Beech wood grain. The edges are rounded and the wood won't splinter, making these panels safe to use for toddlers. For ages 12m+. Size of largest: 12"L x 6"W.