Give each player a food chain card. Several chains may be created with the cards and number of people available. When all are ready, have each player find and join hands with the food chain member on whom he depends for survival.
When all members of a food chain have gathered together, a circle is formed, and the group performs a lap sit (each person puts his hands on the hips of the person standing in front of him, and then everyone in the group lowers himself so that he is sitting on the lap of the person behind him -a self -supporting circle is created!)
All members of a food chain are important. If your players don't believe this, have one person representing an animal in the middle of the chain stand up!