Noun
A jungle gym.
A row of bars, found on playgrounds, under which one hangs by the arms and crosses by brachiation (swinging between bars, legs dangling down).
Source: en.wiktionary.orgMonkey bar," Annabeth said. "I'm great at these." She leaped onto to the first rung and start swinging her way across. She was scared of tiny spiders, but not of plummeting to her death from a set of monkey bars. Go figure. Rick Riordan