Instruct: Classify a given review as either positive or negative.
Query: Broke in 20 minutes

Worked great for about 20 minutes then it broke in half. Its a great idea, but needs to be far more durable. My son is 5 years old and weighs about 40 lbs...he isn't a big kid. The E-Z bar broke at the pivot behind the seat after about 10 rides over a 20 minute period.Product worked great up until then. We were making great progress. I would like to order another one, but the pivot is very weak and I'm faily sure the next one will also break. Too bad...this product could have been really great.