Did Bezos just tease Amazon plan for Alexa-on-wheels home robot?

Maybe it really is just his kids messing around and we're all making the proverbial mountain out of Bezos' Instagram post/molehill?

Did Jeff Bezos’s kids really use blue painters’ tape to attach an Amazon.com Inc Echo speaker to a robot vacuum cleaner? Or was his Instagram post on July 30 just a teaser for his company’s next device? 

The Amazon chief executive officer and world’s wealthiest man took to the photo-sharing app to post the image along with the caption: “What?!!!! Found this in the living room when I got home. I have no idea. #LifeWithFourKids”