Amazon offers the Anki Overdrive Starter Kit, model no. 000-00031, for $119.99 with free shipping. That's $15 under our mention from a month ago, $30 off list, and the best deal we've seen. It includes two robotic supercars, six curved track pieces, four straight track pieces, two riser pieces, a 4-car charging system, and tire cleaner. The cars are controlled from the Anki Overdrive app on your iOS or Android device.

Orders placed by December 22 are guaranteed to arrive in time for Christmas via Prime shipping; otherwise, upgrade to 2-day shipping by December 22 for $21.40 for guaranteed delivery.

A close price: Target offers it for $120.99 with free shipping. It won't arrive in time for Christmas.