A great idea: Australian company Merry-go-round make reusable greeting cards. Regifting…from the card up! The cards have little slits inside that hold a message on a separate slip of paper. Recipients can then replace the slip of paper with their own new message. And play it forward. Featuring the artwork of children’s book illustrators, they’re printed in a limited number. I like this bit: users each fill in a little blank tree on the back, so you can follow how many sets of hands it’s passed through. Sweet.