Related abilities

Enjoys toys with more complex patterns and shapes

Experiments with cause and effect e.g. shaking a rattle and realizing it makes noise

Is able to calm during car rides when not tired or hungry

Enjoys bath time (2-4 months)

Is usually able to tolerate diaper changing without crying (2-4 months)

Is not upset with everyday sounds

Is usually happy when not hungry or tired (2-4 months)

Does not demonstrate frequent or long bouts of being upset (2-4 months)