This might sound like an odd question but how would I get my 4 year old into the bath if I couldn't lift her? She's getting too heavy for me to lift and I have quite a deep bath. I can obviously put a step on the outside, but what of the inside? Would a grab rail suffice? I use a bath mat so she doesn't slip in the bath but I'm worried she just isn't tall enough to lift her leg up and over the side to get back out.