Solar powered walkway- http://www.instructables.com/id/How-to-Make-a-Solar-Powered-Walkway/

Mosaic on blocks for garden art- http://www.pinterest.com/pin/350647520957466566/

I could see a small quilt mosaic on blocks that are glued together for a garden art piece. It would take 9 blocks.

Mosaic like a bowling ball.

Stacked as a totem with corners turned 1/2 turn. Topped with a shallow glass bowl for a bird bath.

Glass block signs in the garden. "Herbs" "Veggies"

Personally, I would re-do a wall in my master BR/bath with them!
I'm thinking garden tub with a glass block wall!
I don't know why they ever went out of fashion!?!?! Nancy

Thanks all everything I looked up was holiday crafts and seasonal.
Tree

I got about a dozen this year...haven't done it yet but planning on using them like bricks/pavers to line a flower bed. Putting them flat so the lawn mover can roll over them.