Wirecutter

Beautifully built and appointed, the Woom 3 is super-light, super-zippy, and chock-full of kid-friendly features—for a price.

amazon.com

BabyGearLab

The Huffy Moto X is a nostalgic, throwback bike you might remember from your youth. This cool-looking bike comes complete with training wheels, wire-spoke wheels, a number plate, folding pedals, rubber handgrips, and two types of brakes. It has quick-connect parts and is one of the lightest in the group. 
There isn't much to dislike about this bike, and compared to the competition, it fared well. We imagine some kids won't like the number plate, but this accessory is optional and easy to skip. We think this is a good option for parents on a budget or looking for something with a handbrake for prepping for future bikes.   

walmart

powerreviews

Heavier and not as trail-friendly as our top pick, the aluminum Jazzi 16 nonetheless boasts child-friendly geometry and a low price. (A matching “boys version”—differentiated only by a higher top tube—is currently out of stock.)

Kids Bike Comparison