You need at least 14 people for this, another reason why this game was often played in school. Pick seven people to be 'it'. Everyone else puts their heads down and their thumbs up. The chosen seven sneak around and push down the thumb of any person they choose. (One to one ratio). Then, when everyone has made their selections, someone calls out 'Head's up, seven up!'. The seven people who had their thumbs pushed down stand up, and each person gets one guess to pick who chose them. If they get it right, they take the person's place. If they don't, they sit down, and their chooser stays up. To play with fewer people, have three or five people be it.

Both of these games are good for about six years to ten, but even older children will enjoy them. As far as keeping children entertained, don't allow any downtime. Have breaks for snacks, but not enough time for milling around and getting into trouble. Prizes always offer an added thrill, but don't leave anyone out!