You need two of the shirts for the heart scale magic to work and they are available for men and women in multiple sizes. The shirts range from $17.99 to $24.99 and are in stick right now. Recommended ...

Check out these geeky T-shirts, a great geeky Valentine's gift for you and your partner. ... The 8-Bit Dynamic Life Shirt is available to buy online from $11.99 to $24.99 from ThinkGeek.