Lion's Cub
Gather the group of players in the play area, and pick one person out of the group to play the lion. Situate the lion in the middle of the yard, and the rest of the players about 10 feet away from him on any side. Place a small stuffed lion in between the lion and the group. The game begins when the lion turns around so that he can no longer see the rest of the players. Every member of the group must take a turn trying to capture the lion's cub without getting caught by sneaking up behind the lion and snatching the stuffed animal. If the lion believes she hears a player behind her, she growls. If a person did try and steal the cub, he becomes the new lion and the old lion joins the group. Play the game for as long as you like using this process.
Blind Squirt
To relieve your party guests from the heat of the sun during a barbecue, use some rope or a garden hose to create a circle on the ground large enough to fit all of the players inside. Give one player out of the group a water gun and tell her to stand in the middle of the circle. With all of the players inside the circle, begin the game by blindfolding the person in the middle. She has to try and squirt as many players as she can using only her sense of hearing. Players must stay inside the circle and try to remain quiet and stealthy to avoid the squirts of water. Anyone who does get squirted leaves the circle. The last person remaining in the circle wins the game and becomes the new shooter.
Mating Game
While you play this game, you can refresh everyone's memory on his biology. The game begins by dividing the group into one carnivore and pairs of herbivores. The herbivore pairs have to come up with a way of recognizing each other before they get blindfolded. This could mean developing a mating call or wearing a particular scent. The carnivore also wears a blindfold as well as a bell so that whenever he moves, the herbivores can hear him. Situate the carnivore in the middle of the yard, separating each pair on either side of the carnivore. The herbivore pairs have to try and find each other without getting tagged by the carnivore. They can only sound their mating calls whenever they stand still. Whichever herbivore pair that finds each other the fastest without getting caught by the carnivore wins the game.