9 months & up. The Over the Rainbow - Bright Silicone Stacking Arches is an ideal toy for open-ended play! Layer them, explore what shapes can be made standing up and on their side, nestle together, or balance on top. Each arch has a unique pattern relating to the garden. Press into playdough to reveal the shapes and create your own garden scene and story. Add to bath time, sensory play fun, or in the dirt. Made with super soft food-grade silicone, pieces are BPA-free, PVC-free, latex-free, and phthalate-free. Can be cleaned using a sterilizer, placed in the dishwasher, or warm soapy water.