Another great stacking toy made by hand with the environment and children safety in mind. The large rainbow stacker by Imagination Kids is available to buy online and is one of the great Etsy finds. The rainbow is made from sustainable harvested forests and the paints are non toxic, even the wood polish is natural, handmade from jojoba oil, beeswax and essential oils. They are individually crafted which makes them completely unique pieces. Young children imagination can fly high with the many arrangements possible, from rainbow to tunnel to arch.