Chalkie Outdoor Blast Balls, help you and your children to enjoy lots of outdoor fun. When you toss the color bomb it sprays out powder upon impact. Use it in a ==-==chalk fight==-== with friends or toss it on the sidewalk to create vivid, random displays. Each chalk ball is good for more than 200 throws so you can get a long afternoon's worth of fun. The product is safe to use and washable so you can keep everything clean.