N.B.
I have a 4 year old boy and he wasn't ready until he was 3 for the potty. I just got a stool for him and one of those padded seats. He didn't like sitting on the padded seat so when he needed to poo I would put him on the regular seat backwards. He has always stood to go pee and hasn't had any problems with aiming. He's tall enough now to stand without the stool which makes it nicer when we're out at the store. My husband found a little board book that has a button that you push and it makes the sound of a toilet flushing and a little boy laughing. It's titled "It's Potty Time" and is published by Smart Kids Publishing. The website reference on the back is www.pentonoverseas.com but I haven't ever looked at their website. My son loved this book and still loves to have me read it to him sometimes. Anyway, I hope this helps!