Thinigiverse user Zamanlui’s copy of a Tiny CNC

Thinigiverse user Zamanlui printed a Tiny CNC with the idea to turn it into a platform for a phage/bacteria printer. While I realize that a two-axis CNC machine can be used for just about anything, I LOVE the idea that something this easy and cheap to build could be put to such noble uses. ((Especially when my most noble idea is to make the ‘bot cheat at Tic-Tac-Toe)) This makes me wonder…  what other potential uses would there be for a simple low cost CNC machine?  Here’s what I have so far:

• Phage/bacteria printer
• Drawing robot (one-off business cards, playing Tic-Tac-Toe, etc)
• Drawing electronic circuits with a conductive ink pen ((How awesome would it be to use a Tiny CNC to draw an electronic circuit used to power a Tiny CNC?!))
• Adding a third servo for a Z axis and a fourth servo for a gripper for a tiny sorting robot
• I guess you could turn one into a useless machine that turns itself off?
• Automatic pencil sharpener?

What other ideas can you think of?