My 9 and 10 year old daughters were in levels 2 and 4 last year, and they got a set of uneven bars for Christmas. They have used them non-stop! My 9 year old has just skipped level 3 and jumped straight to level 4, and my 10 year old has moved up to a level 5/6 group. The bars are solid and sturdy and very good quality. Not only are we super impressed with the product, I was just as happy with the serving and advice given by the team at Little Gym Shop. I highly recommend them for gymnastic equipment.