These 6 rectangular panels are made from sustainably cultivated European Beech wood. They're designed for use with our Rainbow Wooden Architect Rectangles (# 73414) 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 wonâ€™t splinter, making these panels safe to use for toddlers. For ages 12m+. Sizes: 8.9"L x 6.1"W - 5.5"L x 2.5"W.