for my boyfriend last year i cut out a bunch of hearts from colored paper and put sayings on them from stuff we say to each other, things we like to do, fun memories, stuff like that and i hung them all over the inside of his truck. when he opened his door he had the biggest grin on his face and left the hearts in there for a good month! haha he loved it! and then i made homemade heart cookies with pink icing on them. they didnt last very long