I want to sell beaded items to school kids in JR high and give a percentage to the school for their funding.?

I want to get my name out there and make a little money and help my locla schools at the same time. What do you think. Ideas here? It would be school spirit stuff. The school colors, mascot etc. Do you see any problems I might encounter? I want to be prepared and set before I involve the school. I want to come about as profesional. Your thoughts and ideas are appreciated!