Unscrew and screw different spheres to mix and match patterns. Or, fill them with beans, rice and bells to explore sound, speed, and weight. Use these texture spheres on paint, dough or clay. Children can roll creative patterns on paintings, paper borders or dough creations. Easy cleanup with warm soap and water. These spheres are made with thick rubber for extra durability. The smooth warm rubber feels great in children's hands as they roll the spheres. Size: 2.5" dia. For ages 2+. Each set includes 4 rubber spheres, each with a different pattern: stars and dots, parallel stipes, circles and dots and multisized dots. Sold as 3 sets for a total of 12 spheres.