Thanks to Michele for this Frugal Baby Tip!
When Arran was 2, we bought him a Cosco potty that you are supposed to be able to put on your toilet as well and the bottom is supposed to be a step stool. In practice it didn't work. The seat moved around a lot if you put it on the big toilet, this is after installing it according to the
directions. The step stool had such a narrow step Arran could only fit his toes on it to climb. He wasn't ready to potty train at that point anyway so when we moved to Alberta 9 months later we sold it in a garage sale with a ton of other stuff we didn't want to haul across the country. A few months later when he turned 3 we picked up a little wooden folding chair with a plastic potty at a 2nd hand store. My mother-in-law and Arran painted it red (which made it lose it's folding ability, lol they painted it open) anyway, he loved it and when he was ready to train a couple of months later he used it for about week to pee in then he decided that he wanted to stand up just like daddy.
He still used it for BM for a month or so. Then he decided that he wanted to sit on the big toilet, so we got a sturdy toilet ring and a Rubbermaid step stool and he used that until he was 4. Now he has graduated to just the stool.