Good way to raise money?

Me and my friend want to raise money for red nose day, we are 13 and we want to do something good and not boring. Our school wont let us wear PJ's or anything like that but we don't mind doing stuff out of school.We can't really afford to spend money on something like a skydive but we want it to be fun! Any ideas? oh and im on my dads account that's why im 'steven' !