I saw a card at Walmart unlike any I've seen before. It was a picture of the bottom part of a guitar on a pocket card. You grabbed a tab inside the pocket and pulled. 5 slide out sections of guitar neck came out of the pocket. They came out a certain distance and then stopped. You'd have to pull on it pretty strongly in order to make it break.
Pulling the guitar neck to it's full length then triggered a sound chip inside the card that played a classic electric guitar riff.
Anyone ever made a card like this? You could do the Christmas Leg Lamp, for instance and when you pulled the leg out all the way it would play a few bars of a Christmas song. I'm sure other people would have some fun ideas for this.
You can even buy recording chips for your cards. You pull out a paper tab and speak into the chip for a few seconds. After that, when you open the card it plays back whatever you recorded. So that would work for these cards too. What do you think?