DS2.7 was committed to a script where he and I were a mother and baby bat. That plot lasted about 2 months around Christmas, when he was just 2, and he was so attached to the role that he even referred to us exclusively as "Mummy Bat" and "Baby Bat", including in his sleep talking. I ran with it.
He's gone through countless other mother-baby pairs, where we act like the animals, talk about and act out various facts about the animals, and build imaginary homes for them.
Lately, he's into making and animating creatures he builds out of lego, and personifying his trucks and stuffed animals as children. It provides interesting insight into how he perceives our family dynamics, because the babies are invariably happy, use positive self-talk, discuss their emotions in "hypothetical" situations, and talk at length about loving their mothers. As the play parent, DS is solicitous, gentle, and endlessly patient. It's heartwarming.
