Spiderweb Balloon for Halloween - i have seen this done for things other than Halloween. Just get pretty colored yarn and can use as decorations or centerpieces (of course, my kiddo will insist on using white thread!
Great game idea - disposable plates covered in tissue paper with stuff inside. Kids punch through the paper to get the goodies. Trunk or Treat idea!-- a bowl would be easier to punch thru then the plate to get the prize I would think