The first line is between their hand and the object. Reaching out is a conscious decision to grasp. Procedural memories for different forms of grasp that the person learned to do by habit are observed with most people who have a cognitive disability. A conscious decision can also be made to put the object down or hand it to another person.
When they throw something at a target, the line is between the object and the target.
Independence in blowing bubbles probably enters the scale within ACL 3.0.