An animated GIF showing each step in making this comic.
I came up with this one spontaneously while talking to my Roomba -as you do. :P
My main concern was making the last panel as clear as possible. I didn't want people either not recognizing the Roomba, or thinking she was actually referring to the baby all along!
I briefly considered having the Roomba "talk" but felt it took away from the simplicity of the joke, so I took it out again.
At the last moment, I changed the kids eyes to both be looking at the mom. With the baby in the middle of everyone, I worried that the calico kid could be seen as looking at *him* rather than the Roomba.