I received one of these as a gift last year, and figured how hard would it be to make one. It was not as easy as I thought but just about anyone can make it with a little caution and safety measures.
Use a glass building block to make a decoration, by drilling a hole and inserting Christmas lights, then add some decorations on the outside of the block.
Step 1: Prepare to drill the glass block.
Items you will need for this step include:
8 in X 8 in X 3 in glass block (Home Depot)
glass and tile drill bit 1/2 inch
Drill press preferably
and Eye protection