Hi everyone, I am very new to the mechanical engineering field, all I currently have is knowledge of basic physics. I am trying to construct motorized roller blades (not for practical use, just a demonstration). I need help either building a small/power motor, or after purchasing one, how to connect it to the wheels to be able to make them rotate, and how to make a mechanism to be able to turn the motor on/off. Preferably it would be best to add the motor to already existing roller blades, but new ones can be created as well. Can someone please help me out with this? Thank you very much.