A run and grab game. Kids chase an adult who is wearing a candy-shirt - a shirt with candies sewn on.
An old shirt Candies Needle and thread
Find a brave adult volunteer for this game. Before the party, take an old shirt and attach wrapped candies to the back of it with a needle and thread. Thread the needle through the end of each candy wrapped and then through the shirt. You'll need a separate thread for each candy, because the idea is that the brave adult is going to be chased by lots of kids who will try to grab candies from the back of the shirt. Don't be tempted to use staples: there could be lots of bloodied little fingers. You'll want enough candies to have at least 4 or 5 per child. Make sure that you set up boundaries and that the adult doesn't run too fast.