From 10 months to 4 years. Each Whirly Squigz is made of 100% high-quality silicone, colorful, pleasant to the touch and safe for teething. Hold them, explore their unique contours, chop them on them and let them soothe sore gums... Then, stick them on any smooth, flat, non-porous surface – such as a bathtub wall, table or window – give them a spin, and... WHOOSH! - Around and around, they go faster than the eye can see!