[Sub-Stage] 2 First habits and primary circular reactions phase [Age] 6 weeks-4 months [Description] 
"Coordination of sensation and two types of schema: habits (reflex) and primary circular reactions (reproduction of an event that initially occurred by chance). The main focus is still on the infant's body".[25] As an example of this type of reaction, an infant might repeat the motion of passing their hand before their face. Also at this phase, passive reactions, caused by classical or operant conditioning, can begin.[26]