Kristin,
Just wanted to add a few more simple luch ideas. My day care kiddos all love anything rolled up in a tortilla, including some refried beans and cheese!! Also, just some cut up turkey and cheese, maybe some fruit. Right now there are great halloween sized bags of teddy grahams, granola bars, animal crackers, and ritz crackers. I plan to stock up right after halloween as they are just the right size for a little treat for my children. I would not send too much, as the kids are so caught up in conversation etc, that they dont eat as much. They are also usually given a decent morning snack, but be prepared for him to be hungry when he gets home. Maybe even a bag of dried cereal and a sippy of milk will help on the way home. Be somewhat prepared for some new melt downs after school as the stimulation he is getting is new, and although he may LOVE it, it is an adjustment to make. Again, make sure that he isnt hungry and waiting for food, as that seems to be a big source of tantrums many parents dont consider, since the child isnt saying they are hungry. I hope he will have a great time, and that you will enjoy some time for your self as well!! Let us know how it goes:)