For those who wanted to know how to make the glass blocks, it's way easy.
Supplies:

1) 
Glass blocks - available at Lowe's or Home Depot and surely every other big box retail hardware store.  Also available at craft stores, altho I found them less expensive at the hardware stores.  The "new" ones (sometimes marketed as "craft blocks") come with a 1.25 hole already cut in one of the sides, and usually a plastic "cap" to cover the hole and hold the light string in place.  They are usually 9 x 9, but I did find some 6 x 6.
 
If the block does not have a hole already drilled in it, you will have 
to do that yourself.  I would Google "glass block lights" and find a 
video or better instructions.  You will need a glass drill, and water or
 oil, and there is a fairly high incidence of breaking the block.  Get 
the pre-drilled kind if at all possible!
2) 
Lights - I used strings of 50; one string per block.
3) 
Ribbon.  I like the wired ribbon that is somewhat sheer,
 because I thought it made better bows.
Process:
Stuff the lights inside.  Tie the ribbon around the block.  That's it.
You can use your imagination all day long, tho.  White lights, multi-colored lights, all red, all green, all purple, or a mix of two colors - whatever turns you on, or matches your decor!  Then mix or match the ribbon.
I used white lights for everyone and a different ribbon for

 each couple for whom I made the blocks.  I gave them in sets of two.  I also think they could be a really nice thing for someone celebrating Chanukah.
I made five sets in one afternoon - it's really easy!  And, the total 
cost is $6 - $10 per block, depending on what kind of deals you get on the pieces 
parts. 
For us, I made the third small block because I wanted to stack them.  In the first year, I kept them out all year and changed the ribbon for holidays: red for Valentine's day, green for St. Patrick's Day, and red, white and blue for the patriotic holidays - you get the idea.  Got tired of all that ribbon-tying, so have settled for Christmas ever since.  
Enjoy! and thanks for asking.