I would not participate in anything so....distant as this. When kids come up to me and ask me to order stuff I almost always will do that if I don't have to pay right then.
I don't always have any money on me so I have to say no. Now if I know they're coming to collect money, maybe they posted their fund raiser on FB and I commented on a post saying I'd order something, come get the money, then I'd have it with me.
I think it's a better way to teach the kids to work for their funds and to get out there and sell things. This helps them with public speaking and having confidence.
For BMX we stood at the doors of Walmart and took donations for the Leukemia foundation. We made hundreds of dollars in a couple of days.
For Young Women we had a meal that you bought ahead of time then picked it up on the designated date. That went over extremely well. One person cooked all the food in her kitchen and all the styrofoam containers were filled at her dining room table. This way all volunteers were supervised and all servings were the same. Members of the church were asked to make donations of food that was needed for this meal and a few just wanted to donate a little money to buy the items needed.
We've had different organizations do this sort of fund raiser, buying a meal, and it's always a success. The meals have been between $7.00 and $8.00. It's a good deal for the people buying it and since it's all homemade it's a good source of funds for the organization. It completely depends on the volunteers though. I went over and did stuff the day before and day of. Then I went to work and took about 8 meals that I'd sold to those I work with so they didn't have to drive across town to pick them up.
Another fund raiser we've done that is a lot of fun are car washes. But if it's older kids and girls they get wet and it's just not cute anymore. It's different. So if these are older girls then no, not a car wash. But if it's a sports team of younger kids and lots of them then a car wash is a lot of fun.
You can google common fund raisers and get a lot of ideas too.