Bath time toy

DD's favorite thing now is just a plain old cup. I don't even put the other toys in the bath anymore. She love filling it up and then dumping it out again. She too hates rinsing her hair but we have her pour some on DH's head (hanging over the edge) and then he gets to pour one on hers. I just pour one and then she pours one on herself and then I pour one (I tell her we are taking turns and it works for the most part). I've seen the bath markers at the store and am thinking of trying those.