For my mom's birthday, I made her a card with a crocheted flower on it. First, I put paper onto the card. (I used wrapping paper for this actually.) Then, I sewed a button onto the middle of the card.
Then, I slipped the flower onto the button. The flower is detachable this way, so the receiver of the card can use it for something else, but the card is adorable too.
Mom liked the flower so much, that she wanted to wear it. I used hot glue to glue the button onto a pin. After it dried, I slipped the flower on. The flower is still detachable, so you could change the color of flower depending on your outfit.