For the theme "sandcastles," I went for the simplest type possible: digging holes in the sand and then mounding it up by hand. I looked for a sandcastle-themed set of colors and went with this one:
Color by COLOURlovers
I'm not all that happy with how this turned out, and it didn't do very well in the contest. But here's the funny thing - even though I think some of my other recent entries are CLEARLY far superior to this one (pickles and power tools), this got a handful MORE votes than either one of those. I can only shrug!
My favorite entries were these two.