preagainpan, it's really up to you. If you have non-slip mats or stickers on the bottom of the bath, and your DS is supervised, it's probably ok. Without a non-slip bottom I would be a bit worried as it is very easy for a child to slip in the bath. I think it's the leading cause of chipped teeth in kids! Having said that, I have also struggled to keep my two active DSs sitting down, and they have pulled all the non-slip stickers off now, so we are probably very lucky that we haven't had an accident yet.