Begin the battle this Valentine's Day with the Battleship Valentine's Day Cards Each Valentine Card features a set of math problems that will decode a secret message. The Valentines also feature a kind message to give to your friends and classmates like "You call the shots, Valentine!" These are great for classroom exchange or parties at home. The back of each card has a large space for To/From for easy identification. These cards will sure to be a blast this Valentines Day