PROJECT MATERIALS: Kelee explains, "You will need colored plexiglass squares cut to 4" x 4". Key chain at desired lengths. Photos of friends and family copied on clear transparency paper. Clear drying spray adhesive. SIMPLY: Drill a hole/s in the plexi-glass; cut the image to fit the square. Apply the image by lightly dusting the plexi-glass with spray adhesive. Use key chain to link together or to hang singularly on your Christmas tree. Also, you may use a window-adhesive hook to display just one."
I checked online to find out the prices of plexiglass - a colored 12 x 12" plexiglass sheet is only a few dollars. This company sells plexiglass.
Another great idea using plexiglass is to display tons of photos