Introduce early math skills and problem-solving with this Plan Toys® Shape Sorter. Plan Toys® is the first company in the world to manufacture toys from reclaimed rubberwood to provide a more sustainable solution for playtime. Stacking toys are crafted from solid rubber wood. Base is made from PlanWood. PlanWood is a high density fiber composite wood made from reclaimed wood particles leftover from the manufacturing process of toys in the factory. Finished in child-safe, water-based paint. Benefits of play are: Improved fine motor skills, visual and spatial perception, balance, trunk and gross motor protective responses and creative play, among other benefits. I have other Plantoys listed if interested in bundling.