Soft, squishy balls designed to fidget away stress. Hold and bounce the Rubbabu Whacky Ball Assortment for fun sensory play. With interesting whacky shapes, velvety soft surface, and bright colors, children will love using these during play. The soft natural rubber foam material is eco-friendly. A display case is included for easy clean and storage. Each ball measures 4″ tall to easily grasp. For children ages 12 months and older.All Rubbabu toys are made with carefully chosen ingredients that are safe for babies, toddlers, and infants. The rubber materials are 100% pure rubber from the Hevea tree while the soft surfaces are made with nylon flock from Spain. All materials abide by federal safety guidelines and do not contain harmful or banned substances. The materials can be easily cleaned with a damp cloth. Excellent tactile sensory toy for children.