How much fun is this? The project was easy. I held black construction paper just below the eyes of each portrait, and lightly drew a mask shape to match each face. After cutting out the masks, I applied Elmer’s Glue stick…one of my very favorite craft tools, and attached the finished masks to the glass.  Elmer’s Glue stick (washable variety)  washes off and is easier than tape to remove. When Halloween is over I can easily pull off the paper masks and bats, wipe away the glue with a damp rag, and then Windex. Spooky and easy!