I have seen several good snack ideas on here.  However, in Missouri we cannot
take anything to preschool or school that is prepared at home in any way.
All snacks must be store bought.  In case your state has similar regulations
here are a few suggestions for store-purchased, pre-packaged snacks:  small
boxes of raisins, Keebler Town House, Club, and regular Graham crackers, or
any other brand of crackers which are dairy-free, dairy-free cereals, and
dairy-free pretzels.

Sandy