ONETWOFIT Gymnastics Expandable Junior Training Monkey Bars When your children are little, they can use the ONETWOFIT Gymnastics Expandable Junior Training Monkey Bars ($89) as an indoor swing set. When they get older, it doubles as a junior gymnastics training bar made with heavy gauge steel, so they can practice what they learned in class under your supervision. Image Source: amazon.com ONETWOFIT Gymnastics Expandable Junior Training Monkey Bars $89 from amazon.com Buy Now