The Schwinn Stardust and Aerostar are a great choice for kids who aren't tall enough for standard 20 inch bikes. Another feature we like is the dual braking system. There are linear-pull and coaster brakes on the rear to make sure the rider will stop without having to learn a new way to do it. There are no gears or front brake, the frame is super sturdy and the alloy rims aren't going to rust.
Full specs are to the right.
As we found you might want to drop the seat below the recommended height until the rider is comfortable with the bike. We lowered the seat until she had both feet flat on the ground while sitting on the seat until she was used to it. They're tough, well built and have growing room.