Enjoy an afternoon of fun with the whole gang with these Voit?? 8 1/2" Playground Balls, 6-Ball Prism Pack. They are ideal for low-impact, high-energy activities on the playground and in the gym. The Voit balls are made of two-ply rubber for durability and safety. Each pack comes with blue, green, orange, purple, red and yellow balls to add some variety to your activities. These Voit rubber playground balls work well for use at physical education classes at school, for family fun at home, at child care centers and more.