You're right Woofie, there are all sorts of ways you could make them. A bigger one would be cool. And heavy! I was surprised at the weight of these little ones.
Thanks Lynn. The glue I used is shown in the first picture. It's from Ace Hardware and is called All Purpose Adhesive. I got mine locally, but here it is on line:
http://www.hardwaretogo.com/pr... Note that this price is for 6 tubes.
I did leave mine outside this winter so will be anxious to see how they held up during the freeze/thaw cycles.