Windows XP bug that I love
Pretty sure, Im not the only one who does this. When you make a square (to select the desktop icons) with yout mouse and press the menu-down button (usually next to the windows key or Ctrl) before releasing the mouse-click the square imprints on the screen. :) Repeat the same and draw pics like the above, if you are jobless.
The magic button
You can draw on the Windows XP desktop.