I don't recommend serving breakfast! It's already a lot of work just doing two snacks and a lunch. It's a whole other meal you have to plan, and once you introduce that, parents will be very upset if you ever decide it's not working. I know this, because this situation just happened to me. I was serving breakfast and decided to stop because all I do all day is just prepare meals, serve meals and clean up after meals. I wanted to have more time to play with the kids and do activities instead of spending my whole day in the kitchen. I would recommend to just serve breakfast for morning snack instead of doing both. I've switched to serving breakfast at 9am, and I just ask parents to feed their children a little something first thing in the morning to hold them over until then.