Stacking boxes are a basic prop for playing. This colorful, water-based stained wooden set will endure through years of stacking, nesting, sorting and pretend playing. (It's also useful as a diorama box when your child gets older, and as organizers when no longer used as a toy!) Turn them upside down and hit with a rubber mallet to hear different tones. We know of 8 year olds who play with this everyday - shouldn't these children be the ones who are acknowledged as being quite bright and creative? rounded edges and hand dipped in water based non-toxic stains by Grimm's Spiel & Holz Design. Largest box is 6". E-0 grade birch plywood. Germany