PlanToys 40 piece wooden block set consists of 6 differently shaped blocks and is a great starter set for toddlers. Blocks are both natural rubberwood and some have colors applied. The blocks have a safe, non-toxic finish applied and this allows the beauty of the natural blocks to be seen and experienced. This starting block set helps children learn to grasp, stack, and exercise their fine motor skills as they create their imagined structures. Based on the 35 mm. block size