Hold them, explore their unique contours, chomp on them and let them soothe sore gums. Then, stick them to any smooth, flat, non-porous surface - like a bathtub wall, a tabletop, or a window - give them a spin, and WHOOSH! - around and around they go, faster than the eye can see!
They're also great for travel and provide a sensory experience for both children and adults. Best suited for ages 6+ months.