[Sub-Stage] 4 Coordination of secondary circular reactions stages [Age] 8–12 months [Description] 
"Coordination of vision and touch—hand-eye coordination; coordination of schemas and intentionality".[25] This stage is associated primarily with the development of logic and the coordination between means and ends. This is an extremely important stage of development, holding what Piaget calls the "first proper intelligence". Also, this stage marks the beginning of goal orientation, the deliberate planning of steps to meet an objective.[26]