Regular readers will know that I am not a parent, so you might wonder why I'm including a self-propelling stroller in this week's cavalcade of riches. The answer is elementary: It's a smashing idea. Granted, it's maybe because I don't have a child that I think as much. Aside from pushing itself along the sidewalk, the Smartbe Intelligent Stroller can warm bottles, charge devices and play music. It apparently can propel itself uphill and keep pace with you if you're running. At $399 for early crowdfunding backers, it seems decent value.