I have made a small LASER pattern generator using simple DC motors. I had made my first as a kid in school with no speed control what so ever. This one is controlled by an Adruino UNO and L293 motor driver.
This is a very simple setup. The following parts are needed.
2 DC motors
2 round mirrors
something to mount mirros on to the motor rotor. (a gear head will help)
Power to run the motors 6V AC to DC convertor