In games, the heart meter measures how much endurance your virtual character has left and replenishes pretty easily after a boost. But in real life, our heart meters need the closeness of a loved one to fill up again. At least that's how it is when you wear one of these interactive T-shirts. Available in pairs, the heart meters on each T-shirt get low when you're alone. But come within "hugging distance" of the other, and all five hearts light up (and so do you... hopefully).
Each shirt costs $18 - $25 and the transmitter pack costs $20 at ThinkGeek.