Dear S.,
I had a shower space but no bathtub, so I used one of those blue plastic home storage boxes that was just big enough for two kids as the bathtub and used one of those suction bath tripod like seats that kept the baby securely stationed upright while my older one was able to be free in the H20. With the smaller space, smaller amount of water, + the softly rounded plastic sides, it was much easier to keep things safe.I, behind the higher sided walls stayed dryer,kids stayed warmer,toys never floated out of reach, and the closeness of the kids kept them playing with each other.The only thing you need to remember, is you need to be able to tip the plastic to dump the water out-or bail it out until you can, as it can be a bit heavy & obviously, you don't want to leave standing water around. It worked for me and it saved a lot of water too!Good luck and enjoy- mine are now 12 and 8.