All colors of rainbow nesting educational toys are non-toxic water-based & food-grade paint are harmless to human health and suitable for children toys. The triangular rainbow building block can exercise the baby's patience and hands-on ability improve baby's color cognitive ability and hand-eye coordination ability. Manufacturered by Mypre. Mypre rainbow blocking can assemble many shapes stimulate kids' imagination and inspire creativity. Mypre giving the baby/toddler a path to explore their potential and discover their creative thinking and their spatial abilities. Rainbow stacking leaning toy will grow with your child from 3+ years old through preschool and beyond. Premium quality wooden no bacteria can reproduce on wood. Let wooden rainbow stacking game stay with your kids from now on.