Need to make money for D.C. tripp!?

A lot of my friends are going to Washington D.C. next summer for a trip for school we can go on. It's from June 4-7 and we fly there, and get to go to tons of places. The only problem is, it's about $1700..and we have two fundraisers we can do throughout next year, but theres no way I can make that much money from selling candy bars and cookie dough. Any ideas of how I can make money? Something besides the traditional lemonade stand, car wash, that kinda stuff. And we're only in 7th grade so no actual jobs!