Decent little plastic bike on the outside, iron frame on the inside, just the plastic parts on the handlebars loosen after a while, it has gaps and turns a little more, but it doesn't bother during the ride.

Very good and helpful. I bought it for my son, 18 months old. Quite durable and lightweight. The only problem I found is the plastic on the front fork. They would come off from their base, so it would fall.