STACKING TOY: This rainbow tower includes 7 colorful smooth rings with 7 different shape patterns inside and 1 solid wood base. Kids will love to stack the parts on the base and create more forms of towers. STURDY STRUCTURE: This wooden rainbow stacking toy is made of natural wood and stained with non-toxic water-based paint and are fully tested. It is non-toxic, BPA-free, lead-free, phthalate-free, and free of rough edges and burrs. EDUCATIONAL TOYS: Montessori stacking toys can develop colour and geometric pattern recognition, hand-eye coordination, encouraging creativity & imagination, cultivate children's ability to solve problems. GIFT FOR TODDLERS: The classic stacker toy will be a wonderful birthday present and exceptional gifts for 18 months and up boy and girl. It's even a great baby shower gift, as it is an adorable little toy. NOTE: Stacking rings baby toys are suitable for children of 36+months. To avoid the choking hazard caused by the red log ball on the top. It is a good choice for parents to spend time with their children.