Such a simple thing, but a little hand painted stone (painted by you of course!) could be such a gift from the heart and costs next to nothing! (nothing if you already have a bit of acrylic paint and (Diy Garden Rocks)
One thing I really want to do is try painting beach pebble rocks. I have collected so many pebbles which I use for my beach pebble keyrings but so far I have only drilled holes in them - I have never tried painting them.