We ran into Linen's and Things. I didn't have a stroller. I didn't know for sure if their ginormous buggies would fit in the stall. I was about to die. They had one of those really cool hold the baby chairs, but it didn't have a seatbelt! And at 4, Elijah is too little to stand and hold Isabella, who is half of his weight.
Here's the best I could come up with:
It worked pretty well. No babies crawling on public bathroom floors, and luckily we narrowly missed a serious bladder explosion. It was a good day.