Ok, so first you need to figure out foods that the 2-year-olds like. And always cut/slice the food. ESPECIALLY HOT DOGS! CUT THEM IN QUARTERS!!!!!!! And always check for allergies, because not checking for them can actually be a deadly mistake depending on how allergic the child is. And as far as how to serve it, you would be better off serving it pre-plated. Otherwise, if you serve it family style (It's on the table and you can take what you like), the 2-year-olds will only take a couple things, and ignore the others. If you have it pre-plated they are kinda forced to eat what's on their plate.
Trust me, I have a 2-year-old brother