ok i know it's weird but you could have jello wrestling. it was something that my chapter of NHS tried to do in high school to raise money - but the school wouldn't let us.
anyway we were thinking we could get the local supermarket to donate a ton of jello...get a bunch of people to help you make the jello, dump it in a baby swimming pool, and charge people a buck to wrestle their friends or whatever. get some tunes going and you'd draw the people over...especially since you have that nice lawn space. you might be able to make some money that way...or just draw a crowd. i don't know...just a wee suggestion. and its nothing that expensive to pull off either.
good luck
