Coloring Pens/Pencils?

[lawndartcatcher]

Electric. You can get battery operated ones or plug-in ones, but the "leads" in a colored pencil are generally going to be too soft to get a decent point with a hand-held pencil sharpener (it depends on a little blade that gets dull quickly - electric sharpeners use a couple of grinding wheels set at an angle).

I still have the one I used through 4 years of design school. Invest and buy it once.