How to Make a secret message Father's Day card

Father's Day cards that tell you up front that they're Father's Day cards are pretty boring. After all, about 95% of these cards either say "Happy Father's Day" on the front or inside.

Give your father a fun little hunting challenge this Father's Day by making him this cute Father's Day card with a hidden message inside. You open it up like a regular card, with a message on the left and right, then open up the secret passageway in the center to unfold a hidden shout out.