How about organizing a car wash? Everybody who has a car sooner or later washes it or has it washed. So why don't you and your classmates do the job? The money the car owners pay for having their cars washed will go towards your charity. When we did it, we had an amazing time! At first, some of us were worried about getting wet or dirty and it's true. But we also had fun, and at the end of the day it was really worth it!
On the other hand, if you don't feel like getting wet or messy, but have some musical talent, how about organizing a street concert? Street musicians can make a lot of money, and so can you if you've got the talent and courage it takes to play in front of an audience. You just need to find a suitable place, practice for a few hours with your friends first, and give it a try!
I hope the above ideas have helped you a bit, and if you've got any other great suggestions, we would love to hear them and practice them, too. Good luck!
