Do you have someone on your gift list that says tries to guess what is inside the Christmas gift by examining the package? Or maybe you have someone that you just want to play a joke on – either way, this DIY project is a great way to amuse yourself AND potentially others when you give it as a gift.
The gag works like this – when they shake the present, a pre-recorded sound plays from within the package. This simple action opens up all kinds of potential wackiness, from puppy whimpers to screams. You can let you imagination run wild when recording the sound. This works especially well if you set the person up beforehand by telling them you are getting them, I don't know, maybe a cat. Imagine their expression when they hear a meow from the inside.
The circuit is built around a Radio Shack recording module, with a simple shake mechanism to trigger the unit. It should be easy to assemble, and it lets you get straight to the good part – the creative sound inside the box.
via Instructables
Prank
A practical joke (also known as a prank, gag, or jape) is a mischievous trick played on someone, typically causing the victim to experience embarrassment, indignity, or discomfort. Practical jokes differ from confidence tricks in that the victim finds out, or is let in on the joke, rather than being fooled into handing over money or other valuables. Practical jokes or pranks are typically lighthearted, reversible or non-permanent, and aim to make the victim feel foolish or victimized to a certain degree. However, practical jokes may also involve cruelty.
source:wikipedia
