Handle therapy includes several exercises which strengthen the underlying Microsystems in order to make the body work optimally as a unit or macro system. 

Human functioning is of eco systemic nature, in other words, all systems in the body work together as a whole and form a unit. Through exercise the weaker Microsystems are strengthened and therefore the functioning of the child will benefit because of this. An activity like “crazy straw” will for instance improve eye movement, articulation, tongue and lip control, sound sensitivity and blow control, in other words several micro systems are strengthened by one exercise to make the body function as a macro system.