in sand. before the party fill two plastic pools with sand. in each pool hide an equal amount of small rocks. divide guests into two teams and give each a container to hold the rocks they find. one by one each member of the team must race to the pool, find a rock and bring it back to their team's container. set a time limit or amount of rocks that the winning team needs collect. the smaller the rocks the harder the challenge.
moon rock transfer - using the small rocks collected in the moon rock relay above set out 10 rocks on a paper plate. set out another paper plate 