My upstairs bathroom has a unique child-size bathtub that is about 3.5 feet by 2 feet. The side is a foot high. I can fill it with 3 inches of water, put my 4 year old and my 15 month old in there and feel comfortable with it. I keep the door open and stay upstairs though.
I run the Frontier Wholesale co-op in February, May, August & November