Quick update as, in reality, this tech junk is actually more popular with broke adults than teens. The Kansas City council on Thursday approved an ordnance establishing new speed limits, age requirements and penalties for riders user electric-powered transportation devices. Under the ordinance, riders will be limited to speeds of 15 mph or less on sidewalks and under 20 mph on bike lanes and shared-use trails. Riders must also be at least 16 years old to operate a device capable of traveling more than 20 mph, while riders must be at least 12 years old to use a device that can reach 20 mph. The ordinance also requires all riders under 18 to wear a helmet.