This is an interesting question to me since my doc mentioned I need to be look out for a possible mild autism because of the way my daughter slaps herself.
Anyway, she's only 20 months, so while she is learning words, she hasn't figured out how to tell us when she's filled a diaper.
But we've managed to get her to go in the potty about twice a day so far.
When we saw her get all red-faced and grunting, we just ran her to the toilet. Then we started putting her on between diaper changes, and when she happens to pee, we clap and sing her praises. She doesn't go every time we put her on, but she does seem to test her "potty muscles" every time now to see if she's got anything to get out.
Anyway, if you can't even get your kid to sign to go to the potty, you could try just sitting him on the potty at regular enough intervals. If you can get him to figure out, this is when to flex those muscles, it could work.
at 10:21 PM on May. 1, 2009