Do you own the SU Owl punch?
If so, you could have a selection of owls punched from plain and patterned paper in a tray/box on each table which the people can fossick through and create their own owls. Add those goggle eyes for a 3D effect. Make the card front by
tearing paper strips and arranging them on a shape to create a background scene. Tuck the owls into the background.
Attach this background to a card base.