If you give...

If you give an older sister a doll stroller, she'll want you to put her baby sister in it.

Then the middle sister will have a meltdown because that is her baby's stroller.

Next the handsome older father will come to the rescue

After the rescue is complete, the older sister will want the doll stroller back.

And chances are that if you give her the doll stroller back.....

She'll want you to put the baby sister back in it.