Try nearly anything on [www.iwantoneofthose.com
As an example: they sell panic buttons. I would love to get enough to replace an entire keyboard. So then someone needs to touchtype on nothing but panic buttons. Would be really amusing.
Also, www.thinkgeek.com sell a wrist-sundial. Including a compass to orient it properly.
'We're all mad here. I'm mad, you're mad." [said the Cat.]
"How do you know I'm mad?" said Alice.
"You must be," said the Cat, "Or you wouldn't have come here."
- Lewis Carroll, Alice's Adventures In Wonderland