Bloom cards are three dimensional pop-up greeting cards. They run for $5.
"A pop-up card that can be used as a greeting card, gift tag, gift ornament, decoration, ornament sticker, book mark, or a gesture of love to your dear ones. To attach simply remove from the packaging, remove the sticker on the back, and apply."
Implications - Whether you're looking to give a birthday or a congratulatory message, these cards will be a nice change from the conventional ones you normally purchase. In addition to its function as a greeting card, these can also be used as gift tags, decorations or even a bookmark according to the website. It's a fun, creative way to send a message to your friends -- besides, who doesn't like 3D?