> But, to get back on topic, my curiosity is piqued about why so many stude=
nts would
> more readily choose an LCD over a motor.
> The answer might or might not be as obvious as I think

The problem is that anything to do with motors requires a reasonable amount=
 of mechanics to do something useful, which is probably beyond time and ava=
ilable effort in a classroom.

If you could provide the basics of an X-Y mechanism that could hold a pen (=
I am thinking ordinary ballpoint or pencil here), along with some means of =
raising/lowering the pen, then the classroom project becomes a programming =
one instead of a mechanical one, which is probably a lot more do-able. You =
would need to provide some failsafe drive electronics for the motors, so th=
at incorrect programming doesn't pop the drive transistors.

Then I suspect you would get some interest in using motors.
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