Make music by typing on your keyboard

Everything else
1

This nifty little website makes beats based on what you type. This should be good to kill a couple minutes.

http://typedrummer.com/

An article by Wired that explains it a little more.

2

Welp, there goes half an hour.

3

http://typedrummer.com/gp470b

4

Ooo very nice.

Here is the Quarter to Three beat.