Can we play baby?

Madeline and Nathan came and asked me... "Mommy can we play baby with Camille?"

I was curious how this game was played.  They wanted to stroll Camille in Maddie's doll stroller.  I did not know if Camille would like "playing"... but she did!  Camille laughed and loved being pushed in the little stroller.  Today I asked Madeline to "play baby" with Camille so I could get dinner cooked.  And I have NO IDEA why the kids are wearing bathing suits... they came downstairs with them on asking if we could go to the neighborhood pool.  It was below freezing that day!