The recovery of the lost key to the playground gates leads to a spontaneous, exuberant outpouring of fun. Unlocking the playground, Maria and her friends immerse themselves in pure revelry, replete with swinging, double-dutch jumping, hula-hooping, and roller-skating. Adults as well are drawn to the festivities and soon a mother is spied skate-boarding with abandon. The infectious rhythm of Nobisso's rhymes move the tale through the fundamental questions at the heart of storytelling--the who, what, why, when, where, and how of a story: ""Why'd she flaunt the key from the cookie jar?/To be fresh?/To be shockin'?/To be ha-ha-har?"" Holub's vibrant, color-laden illustrations complement the rousing tale. Each gaily colored spread features a happy array of children laughing and interacting, united in play. The book successfully conveys the undiluted rapture of an afternoon well spent at the playground.