My son's birthday is coming up soon and we are REALLY broke right now. He wants a wrestling party since he loves wwe so much. His class has about 15 kids. We really don't want that many 4-5 yr olds running around our house so we were thinking the park, but then we have to worry about keeping an eye on that many kids and possibly being rained out. I am looking for any suggestions on inexpensive party ideas to entertain a bunch of little ones and party favor/ decorations. Thanks!