Do you have this problem? Have your small ones figured out that they can use their step stool to reach the bathroom sink (and many other things)? Mine like to climb up there and turn the water on full blast. Such a simple wasteful pleasure. My youngest some times turns the water on and then says 'Thank-you" to me. She is expecting me to be thankful for helping me out with my hand washing needs. Except invariably she turns it on long before I actually need it.