Children love to mimic at that age
We’ve got our little one, who’s just turned 3, a realistic looking baby doll. It’s a ‘newborn’ doll from smyths and comes with the little hospital band on and the hat so looks like how her baby sister will when she meets her for the first time. She keeps wanting to have “baby in my belly too” so this will be her little baby 🥹
A soft doll, that has a nappy, bottle etc then he can mimic you