This question got bumped to the front page.
From the way it is worded, it is clear that the OP is looking for hardware that can be used for a prank device, but claims not to be looking to use it for malicious purposes.
Is this type of hardware request on topic? I mean yes, it connects/communicates with a computer, but the goal of the device is to prank/"mess with" people who have low computer skills, which is akin to harassment.
(also, I am surprised there is not an ethics tag for meta posts)