By 3 months, your baby can grasp a rattle that's placed in his hand and bring his fingers into his mouth. He also can lift his head 45 degrees while lying on his tummy and can push his legs down when held standing. If your baby does not smile socially, coo or lift his head 45 degrees at 3 months, talk with your pediatrician.
Do you still have questions about caring for your newborn, from crying to pacifiers to poop? Check out our New Baby Manual.
For more information about your baby's milestones, check out these Baby Steps.