I filled up two plastic bowls with water and put ice cubes in one. I gave her a a spoon that drains and had her move the ice cubes from one bowl to another. She did this until the ice cubes were so small they fell through the holes in the spoon!
I did run to the bathroom and came back to pink her pink lamb in the bowl though, so close supervision in required. I did have towels down though just in case! In her defense she told me that Lamb "Wanted to take a bath"! She is such a little stinker!