These both look like good ideas. But what about once you get them onto the table and are eating? When my boys were little I have a divided dish that had a resoivoir at the bottom that I could fill with hot water. It worked great and kept the food warm, even if they took a long time to eat. I always wanted to find something that would work like that for regular dinner plates. Anyone ever seen or heard of a warmer like the second link above (the rice 'easy peesy' warmer) that could stay under the plate during the meal?
Also, I'm so slow about getting projects done that I'd hate to make the easy peesy one if it's not washable.