•Reusable water-filled balls burst on impact! Fill them with water and they burst apart when they connect with a target, splattering water everywhere •The balls have 2 interchangeable halves. Attach 2 halves, dunk the ball in water, squeeze it to add the water, and you're ready to go •This set comes with 3 balls. The balls separate into 2 halves, and the halves are interchangeable, so it's easy to keep refilling them as you play •Nerf Hydro balls are made with soft, flexible material for lots of blasting fun