Do Not Sell
Okay, this one isn't under $100, but it's impossible to not geek out over this stocking stuffer-sized BB-9E robotic ball from Sphero.
Related: 14 awesome toys for the holiday wish list
BB-8's evil twin in "Star Wars: The Last Jedi" is controlled via an app. It listens to your voice commands and moves in the path you draw for it on the app.
Price: $150
