Using motors to ring a bell? I would like to create a motor set up so I can use it to ring a bell inside a small tower. Since I haven't used any of the current LEGO motors was wondering what the group would suggest. 


which motor to use.
which battery/switch to use.


What I need is a simple switch with a motor. Something that I can turn off and on with out much trouble.
LEGO Power Functions would probably be the most suitable option. You could use a PF M-Motor (8883) combined with a PF AAA Battery Box (88000) which has a two-way switch and is more than capable of powering four medium size or two extra large motors (each item sold separately).