I will give credit when the idea is not originally mine. Today we did this:
IT WAS AWESOME.
My girls did not throw them in buckets, but at each other - LOL.
After a few minutes, Daddy went outside to join in the fun. E1 and Daddy had a full out water war while E2 played in the water table and laughed. Every now and then E2 joined in the fun. After some sponge bombs were thrown, the water hose was turned on and they all got soaked. A fun Sunday afternoon.
**Sponge bombs did "break" if thrown to hard. Good thing they are easy to put back together!