E.B.
Hey, I'm not sure if I can help, but I'll throw in my two cents. I have a 3 year old son and I babysit another 3 year old boy, Kolin, during the week. My son wasn't interested in potty training until just about his 3rd birthday and amazingly enough, that's when Kolin's Mom decided to start potty training him as well. We have found that if we work together with similar methods things go more smoothly. We set a time interval to try to go potty and make sure we remind them where to go when the need arises. We haven't done anything fancy to help them, but we just made sure we were on the same page to stop from confusing the poor boy. Good luck!!
Smiles,
E.