K.R.
Anyone will do. I got a potty chair and also one that goes on the actual potty. She uses both and has no problems. They are all pretty much the same. I got her the elmo talking toilet for Grandmas house and a cheap saftey first brand for my house both work exactly the same, then of course we had to get a Dora seat that goes on the toilet as well. They all work the same, just buy one you can afford.