Tender Toys DIY Bouncy Ball Make your own bouncy ball with this fun DIY set from Tender Toys. Shake the powder of the desired colors into the mold and shake gently up and down. Then place the mold in a bowl of warm water for a few minutes. After five minutes, open the mold and you have a cool bouncy ball. Specifications: Mold color: blue Color: multicolor Gender: junior Material: plastic Age: from 8 years Contents: 4 Powder sticks 1 Mold