Feed the Elephant: (Charlie painted this on a washing machine box and used a dryer vent for the trunk.) The kids would place peanuts in the trunk to "feed the elephant" and raise the trunk until the peanuts dropped inside.
Fill a swimming pool with popcorn and and thrown in the gold wrapped chocolate and let the kids search for the gold. This would be a hit! Maybe hide foam pumpkins with numbers or prize colors for prizes and instead of popcorn