The 42-Piece Set is a large building set that allows for big and tall creations. Click wheels on and off to create any number of mobile creations. Includes 42 blocks in 9 shapes: 4 tall columns, 4 medium columns, 6 mega planks, 6 long planks, 6 short planks, 6 cubes, 2 parallelograms, 4 short angles and 4 wheels Ages 1+ Materials: Eco-friendly, sustainably-sourced hardwoods. Safe, non-toxic, water-based lacquers (for colors and clear coats). As a vertically-integrated company, we intimately know our supply chain and suppliers.