These square blocks are made for building with play in mind. Creating different things, learning how to create a rainbow and the feeling of colors. Children of any age will experience fun building different things with these colorful small blocks. Made of natural wood, hand painted with non-toxic natural dyes, these pattern blocks consists of 36 pieces and comes with a natural square frame. All used dyes are water based and in accordance with EN 71 harmless to your health and suitable for children toys. The same is true for the natural oil used.