I've been meaning to do this with Talia for a long time, ever since I saw Emily post about sinking and floating on Learning Vicariously. Today we finally got the tub out and tried it.
I just filled the tub with water & we hunted around for toys & other items to put in, to see if they would sink or float. After we were done experimenting, Talia continued playing with things in the water for a good while. Then I dumped out the heavy tub while she mopped the floor with a towel (which she seemed to enjoy ;).
Things I Would Change: