This is just a game I played at one my 25th b-day , it was called nuts and bolts...as everyone entered the yard, the men were handed screws and the women were handed nuts...all were various sizes and each only fit one another...the object of the games was to find the right fit...while this was not just for winning prizes to the first three, but it also gave everyone a chance to meet each other...it really was a ice breaker and loads of fun.