STACKING RAINBOW TOY: rainbow blocks are flat that makes standing them up well. The nesting & stacking rainbow block set in 6 different colors and sizes. Perfect Learning toys for your kids. INSPIRES CREATIVITY: Arches can be used as tunnels, little houses, hills, rocking chairs, or beds for little dolls... let your imagination lead! Suitable for all kinds of pretend play with a variety of different solutions. CHILD SAFE: Made of non-toxic wood and child-safe water-based paint 100% HAPPINESS SERVICE: We design every toy to the highest quality standards, and to nurture minds and hearts. Please contact us if any problems and we’ll make it right.