This is a great project and your dad will think you spent the big bucks. Record a personalized message like "Dad, you rock. Please send money." Decorate the card with a flattering diagram of your dad (or a photo if you're an artphobe). Everytime he opens it he'll hear your dulcet tones. The chip is re-recordable so you can get the card back from him and send it to someone else with a fresh message like, "Mom, you rock. Please send baked goods."