Instruct: Classify the given review as either positive or negative.
Query: pretty good bike, gears a pain to fix

We bought this for our 4 year old as a birthday gift. the training wheels are a blessing. It took a while to put together the bike, but we never got the gears right no matter how hard we tried. Took it to a bike shop, he said that the wheels lock if you reverse pedal, so we have taught our boy to use that mechanism.A great play/exercise 'get the kid outdoors' gift. It looks pretty snazzy too.