Remove the lids and place in one location. Place the container bottoms in a separate but nearby location. Be sure to have the same number of lids laid out as containers. The total should equal your group size. The noise is deafening.
Humans recognize each other by sight and sometimes by sound.
Divide the group into two sets. Give each person in one of the sets one of the 15 scent container bottoms. Give each individual in the second set a scent container lid. Have the penguin babies gather and mill about in the center of the room. Give the parents five minutes to move around and match scents.