These Mechanicards are so much more than just a card. They are limited-edition kinetic sculptures that are the perfect size to mail. So, in that way, they are a card, but like I said, SO MUCH MORE! They are a little piece of handmade art that you power, so they are interactive as well as interesting. There are several to choose from and are ready-made, but if you are the brave type, there are kits available as well. $50 made, and $40 for a kit at Mechanicards.