When we first brought G home, E kept pulling the blanket off of him. At first we thought it was an attention thing, but we realized it was more that he needed to see the baby. The whole baby. He needed to see that it really was a tiny person we’d brought home, and not just a crying head.
And it’s continued. He loves to point out his own eyes/nose/mouth, and then point to the same body part on the baby. He’s learning that the baby is a person.