My 4 year old got this for his birthday. It is a great product and he has had a blast using it. You do need a lot of patience during assembly. The middle brace section took us the longest to put together because the pieces were not fitting properly. You also need a very large space to put it together. I recommend putting it together in a garage or backyard. You need at least one other person to help you if not 2. My husband and It took about 2-3 hours to put together because the holes were just not lining up well.  Overall happy with the product and it is very safe.