The Nature's Geometry Loose Parts STEM Kit is a laboratory of opportunity uniquely designed to experiment and explore while encouraging sensory experiences and intriguing curiosity about natural materials. Children can investigate new shapes, textures and patterns using the authentic and replicated materials in this specially curated set. Seedpods, branches, loofah pieces, and more can be sorted and stored using the included compartmentalized Poly+ tray. The smallest part measures 2cm L x 2cm W (3/4" L x 3/4" W).