Glass blocks lend themselves easily to Christmas crafts since they are reminiscent of ice blocks. Glass blocks come in different types and styles; for example, there are clear and wavy glass blocks with hollow areas for inserts and glass blocks with pre-drilled holes. The type of glass block you purchase to use for your Christmas craft depends on the type of craft you're planning to make. If you can't find a pre-drilled block for your craft, drill a hole yourself using a rotary tool or a diamond bit.
Illuminated Glass Blocks
Light up your glass block by inserting battery-powered Christmas lights. You can use plug-in lights for this project, but it will limit where you can set up your illuminated block. If you don't want to see the wires and bulbs, choose a wavy glass block or spray your block with a frosting spray. Turn the block into a light-up present by wrapping it in a festive bow. Make several and mix them in under the tree, arrange the presents around the fireplace or place them inside a non-working fireplace.
Glass Block Art
Create frameless Christmas art with your glass blocks. Cut up old Christmas cards, album covers or book illustrations to "freeze" in the glass. Cut the image to the size of one side of your glass block. Insert the image inside the block and face it against the side, making sure you can clearly see the image. Cut off more from each side if the image is still slightly too large. Spray the front of your image with spray adhesive, then re-insert into the glass block, attaching the front of the image to one of the block's sides. Now you can finish up your "art in ice" with some stenciled-on Christmas shapes and glass paint.
Glass Block Centerpiece
Buy a glass block with a large pre-cut hole and fill it with small glass ornaments or other holiday accessories. Stack three or more filled blocks in the center of your table for an icy-looking centerpiece. You can also turn the block so that the hole is facing upward, creating an instant vase. Insert the stems of a poinsettia or sprigs of holly inside the hole to create a Christmas centerpiece.