This is something that Ellie says with glee relatively frequently, as she likes to take her own sleeper off and parade around the living room on the weekends wearing nothing but her diaper.
And when she's done parading (which you can only do for so long before you start to feel a little cold and a little silly), she settles down in a sunbeam to draw things.
If you're wondering, she was drawing the sun. And doing a decent job of it, too. So that's good. Nothing like getting a firm grasp of representational art early on, eh?