W.M.
Hello! How fun! I would do small squares of peanut butter and jelly, chk nuggets, you can have little bowls to choose from with cheerios, goldfish, crackers, nilla wafers, cheese bites, etc You might even be able to do pizza and cut into little squares, mac and cheese. Each mom will get what she wants for her child and cut it accordingly so I would say to have a small variety for them to choose from. Have fun!
If you do cupcakes, you can do mini cupcakes, use a mini muffin tin and they can each have their own baby cupcake, it is easier to eat.