Hurrah Cards on Store Bought Cards

Most of the thank you cards I stenciled onto trimmed, 12x12 craft paper. However, when I was cleaning out my card file I realized what I really should be doing is stenciling onto pretty store bought cards I already owned. I have a bad (good?) habit of picking up sale items in craft and stationary stores. I have more than I need. This is a great way to use them! I must remember this for upcoming holiday cards.