I don't leave mine either. DD is the same age as Heaven's DD1 and my DS is 11mths. At our house usually DH does the bath and I get clothes and nappies ready.

If I am on my own I try and make sure I have everything ready before the bath and they get out one after the other. DD runs around nudey while I dress DS.

I'm just too nervous to even leave DD in there unsupervised - the other night the oven timer went while they were in the bath and I knew if I left it, dinner would burn, so I bolted from the bathroom to the kitchen, turned the oven off, flung the door open and bolted back, heart hammering the whole time!