craftgrrl | Crafter's Block

I've made these nifty celtic-knot tiles. They're about 3 inches square. I've painted them out in blue (background) and silver (knots), antiqued them, and sealed them with a pretty gloss finish.....Now, I don't know what to do with them. I want to do something special with them, but I don't have any idea of what.

This community has the niftiest ideas. Could you help me over this artistic mental block?