When I cook for a crowd, I usually serve Mexican food. Do-it-yourself tacos or burritos are delicious, kid-friendly, and easy to prepare beforehand. Tonight it was carnitas.
The night before your party, put a couple of pork roasts (buy the cheap stuff) in your crockpot and season them with salt, pepper, cumin, onion, garlic, and chili powder. Cook them overnight, then in the morning let them cool and shred the meat.
A few minutes before the par-tay, pour a few tablespoons of oil in a large skillet and fry the carnitas so they get kind of crunchy. Put out tortillas, bowls of avocado, sliced onion, cheese, and salsa along with some beans and Mexican rice (don't forget a pitcher of Margaritas) and let the fiesta begin!