the.com/monkeybars

means A piece of playground equipment consisting of a horizontal overhead ladder you cross by swinging hand-to-hand from rung to rung.

from A 20th-century American playground name, stitching together "monkey" — for the limb-swinging, brachiating way kids cross them, like apes through branches — and "bars," the simple metal rungs. The same monkey-imagery gives us "monkeyshines" and "monkeying around," all leaning on the long-held image of monkeys as agile, mischievous climbers. The formal name is the "horizontal ladder" or "jungle gym," but the kids' word stuck, because anyone hanging there does feel briefly, gloriously simian.