•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 two interchangeable halves. Attach two halves, dunk the ball in water, squeeze it to add the water and you're ready to go •This set comes with six balls in two bright colours. The balls separate into two 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 •Play more, clean up less with reusable Nerf Super Soaker Hydro Ball toys! After the balls burst apart, you simply pick the halves and refill them