basically I need a Children curve that constraints to a point on the parent curve, which will follows the curve point/parameter as the parent curve moves and rotates.
Select the "children" curve, then the one you want it to follow, then attach it to the "parent" as a motion path.
Animate->Motion Paths->Attach to MotionPath
You can the animate the position on the curve on the motion path node
Replies
Animate->Motion Paths->Attach to MotionPath
You can the animate the position on the curve on the motion path node
see if you can figure this out. it should open in a recent version.
http://speedy.sh/5uT88/curve.ma
edit:
you can try to open the ma file and change the two lines at the top that say 2012 to 2011.
it works in 2012 so it might work in 2011.
http://speedy.sh/5ucj8/curve.ma