The Container Play Toddler Loose Parts STEM Kit is a laboratory of opportunity uniquely designed to inspire children to experiment and explore while encouraging the development and strengthening of a child's spatial awareness and fine motor skills. Children can use the various wooden and felt balls, rings, and nesting components as they develop object and texture relationships through construction and deconstruction. Contents or colours may vary. Each kit includes a compartmentalized felt tray that can be used to store and organize pieces. The smallest part measures 4cm L x 4cm W x 2cm H (1-1/2" L x 1-1/2" W x 3/4" H).