Recycle old water bottles and grab some cheap pool rings. You could color the water like the rings too make a more challenging match/ring toss games for the older kids. Add glow sticks for night time ring toss
I wish I knew this tip for filling balloons with treats! 44 for Halloween sucked! to fill balloons. Instead of pinatas for parties. Great idea so that each child can pop one balloon and get the goodies inside.