Yes, but a paper bag doesn't cut it.
![Razz :P](./images/smilies/icon_razz.gif)
(EDIT: To draw *without* erasing the lines, when the image loads, one of the little windows that comes up with the image and Oekaki board will be called "Layers". At the bottom of the "Layers" window will be two layers -- Layer 1 and Layer 2. Click on Layer 2, and don't change anything; and then, you're ready to START DRAWING!!!!
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)