Robin2:
An Arduino can't provide the current needed by a motor but it can provide the PWM signal needed to control a motor through a MOSFET (if you only need rotation in one direction) or though a h-bridge. For your low-voltage motors the Pololu DRV8833 h-bridge would be suitable.An Arduino Uno can only drive 6 separate PWM signals. If you need more then an Arduino Mega would be more suitable.
I have read elsewhere that coreless motors don't like PWM signals, or may need them to be at a high frequency. You should check with the manufacturer. The standard Arduino PWM frequency is 490Hz but it can be changed.
...R
Thank you for the input! I will definitely look into the h-bridge and into buying the arduino mega.
Are there any other components that I should consider? I read about diodes and EMI suppression filters as possible nessecities? Again, I am new to all of this so I'm still learning!
Ian