The Tambino numbers collection encourages kids to think about numbers as meaningful, interactive objects, rather than abstract lines on paper. Each piece is a carefully designed, geometric composition of interacting numbers. They are made of hand-finished, solid American maple plywood. This collection was designed and made in USA. Each piece is painted with low-VOC, lead-free, and water-based paints. All tambino products are designed first with safety in mind: they meet CPSC playground and child safety specifications (for example, holes are sized to prevent arm and head entrapment; edges are rounded. Be sure to see our favorites: the 4-4 stepstool, the 456 chair, the oversized 5 table, and the activity 8 table!