This is our favorite, just 'cause it looks so dang cool and comes very close to the look and feel of the "real" droid from Star Wars Episode VII: The Force Awakes. It's got 360-degree movement which you control with your smartphone or tablet. It's also got a "patrol" mode that lets it roam free. BB-8 has sensors that prevent it from getting stuck and can also respond to voice commands. This is the droid you're looking for.