When Delia's father places a rattle in her hand, Delia often brings the rattle to her mouth to suck on it. According to Piaget's theory, Delia likely developed this skill at approximately what age?

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According to Piaget's theory of cognitive development, the skill described is part of the sensorimotor stage, which spans from birth to about 2 years of age. The specific behavior of coordinating sight with hand movements, such as bringing objects to the mouth, typically develops around 3 to 4 months of age.

When Delia's Father Places a Rattle in Her Hand, Delia