This stool was purchased for my 9 year old granddaughter.  When it arrived she put it together by reading and following the enclosed instructions, with Grandpa helping her get the wheels in place. They required more force to than she could muster. She's been using the stool for a couple of weeks and the only problem we've encountered is she isn't heavy enough to adjust the stool height. If it's raised she needs a heavier person to help her lower it. Lucky for her I am plenty heavy enough to accomplish the task!