Water balloons are a classic summer activity for kids but very wasteful and little bits of balloon can end up broken in the lawn, which can be picked up by locals birds and wildlife, potentially causing health issues. Try a reusable silicone water ballon instead. 

To fill, put balloon in a bucket of water and close tightly with the magnets to seal the water and throw! These balloons take less time to fill and less time to clean up after.