We did a frozen yogurt fundraiser; if you have a local ice cream shop they may be able to help. We went to our local ice cream shop and explained we wanted to have a fundraiser in school. We told them what we wanted (limited the flavors to 3 and the sizes where all the same) and asked what they could do for us. We did this by taking orders the week before the actual fundraiser, collecting the money. We then placed the order for what kind of yogurt and how many. We dropped coolers off and the ice cream shop prepackaged our yogurts and put them in our coolers someone picked them up and brought them to the school. We passed them out to the kid's who ordered them at break time.
We also went to a local distributor for a pretzel company and they sold us boxes of snack size pretzels that we could sell.