This set of Wooden Spools consist of 10 smooth beechwood spools. The word "heuristic" means "I discover." These spools encourage children to investigate their relationship with other objects. Size: 1.4" diameter. • Suitable for ages 10m+, babies and toddlers will be fascinated by the shape and texture of these hardwood spools. • These play spools are ideal for language development and stimulating neural connections through curiosity and intuition. • Nurture creativity & investigative skills as babies and toddlers explore the surfaces, edges and features of these beautiful objects. • An ideal open-ended play resource, watch with fascination as your child derives their own use for these objects.