I notice that many individuals with motor planning challenges, stabilize materials distally instead of close to where the need for motor control is greatest. For example, some students attempt to a grasp pencil high on the shaft, whereas- control is best about an inch from the pencil point.
I frequently assist clients to position hands close to the insertion opening in a container rather than dangle the object distally. In the above photo, the client needs to push the sock in by pressing close to the opening. This seems so obvious, yet challenging!!!