How to make a prank musical caps-lock keyboard

Step 2 Get the musical module

Choose a greeting card with a great cheesy music. Christmas being only a few weeks away, I decided to put everyone in the mood early and went for Jingle Bells. Get something that plays the music quickly, because people tend to stop it early as they trigger it by mistake, so don't get something with a slow start. Also get a loud one, something embarrassing (:

Take the module out carefully and look at how the music is triggered.

Here it's a piece of paper preventing the contact from the battery. Classy.