Mathematical Birthday Card

Note: Before you give this card to someone, write how old they are in the blank space on the front of the card. The answer to the mathematical equation will be their age!

Printed on brown recycled card. Blank inside. Includes white envelope.

This card stock is FSC® Mix certified, produced from 30% post-consumer waste, and manufactured carbon neutral by an ISO 14001 certified mill.

100% of profits fund life-changing gifts for people suffering in poverty.

Greeting card concept by Joel Zerner.