Sentence:  At the slope 's base coils of concertina stretched out of eye range like a wild tangle of children 's <WSD>hoops</WSD> , stopped simultaneously , weirdly poised as if awaiting the magic of the child 's touch to start them all rolling again . 
Meaning of the word marked with <WSD> tags:  a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling