Looking for a 12VDC motor with low RPM

[may ki]

I'm looking for a motor that will drive a colorwheel inside a robot. All of the 12v/DC motors I have discovered so far have significantly higher RPMs (3000+) than I require. I would prefer something that runs quietly between 3 and 10 RPM. I looked online and found a few gear motors to try, but the noise is similar to a power screwdriver going on high. There is a lot of transmission noise that cannot be muffled.
I decided to ask a question here because I am a complete electronics novice. I'm unsure of the possibilities available or whether such a motor even exists.

 

[Nik_2213]

Low torque ? Perhaps a plastic gearbox, or a stepper motor...

 

[Tom.G]

What the heck, you already have a motor/gerabox you can't use, so try adding some oatmeal to the gear box. (dry, uncooked oatmeal)

If size is not a problem, a motor/gearbox that operates the windows in a car.

Or a servo motor as used in model airplanes or boats.

 

[tech99]

A motor from a computer printer is quiet in operation. Alternatively, a cassette motor is very quiet and reliable. You can make a motor turn slowly by driving it with a square wave having a mark space ratio which differs slightly from 50%. Use a low frequency, such as 25 Hz, so the motor armature is shaken slightly, as this avoids stiction.

 

[berkeman]

Unfortunately, a connection between the OP and a spammer was found, so I'll close this thread now. Great responses by you folks to the question!