I found these adorable printable bunting cards over at The Green Gal and they include a free template to print them out! How cool is that?
They would be perfect for a thank you card.
To quote Gabrielle "The four postcards of two designs fit on an A4 page so simply print out (on recycled card if possible), cut along the dotted lines, write a lovely message on the reverse and post to a friend. Snail mail – it still has a place in the world!"
Download them here
Hope you can brighten someones day with these!