Our Cone Sorting is far from a typical stacking toy. Nine colored shapes come in different sizes allowing toddler to explore height, depth, size, patterns, and sequence as he puts all the pieces together. This is a bit more complex approach to a stacking toy as toddler must first stack the inner pieces to make a peg for the larger rings. This stacker is sure to hold the attention of your little one as they stack and unstack the pieces in different ways over and over. Plan Toys is an incredible company with a dedication to environmental and social responsibility. This toy was made from PlanWood, an environmentally friendly initiative by Plan Toys in which reclaimed wood chips from the production process are used to create a high-density composite wood. Add a little organic colorant and Plan Toys has now created their most environmentally friendly toy line to date! And the best part? PlanWood is dishwasher-safe!