Does he look at your food when you're eating it? If you're eating a meal together, maybe you could just take some from your plate and put it on his plate (or highchair tray or whatever you're using) and see if he wants to try what mom's having. Most kids are interested. Other thing you could do is figure out what he really loves and start with that. My daughter LOVES cheese for example...bits of cut up cheese are something she'd never refuse.