Witch Hunt Party Game
Cut out paper witch hats. Whatever number you think would suit the number of people at the party, 3 - 5 per person is recommended. Color two hats a different color from the rest. Hide all the witch hats throughout the house (area where you would be doing this game).
Now let the kids know that there are witch hats hidden and the guests must find them. The guests finding the most hats will in prize (show prize) and there are two special hats that will result in special bonus prizes. Now send the kids to find all the hats, stagger the release if the age group varies a lot and give the younger kids a head start.
The kids who find the different colored hats get the biggest prize and the two who got the most hats collected get the next biggest prize. Have extra prizes in case of ties. Also, you might want some small prizes for the people who didn't get a prize.