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Use "quadricycles" in a sentence
"In Jakarta, Car-Free Sundays attract not just serious bikers but children learning to ride for the first time, fearless teenagers on spring-loaded stilts, roller skaters, and groups of people on four wheeled bikes or quadricycles."
"The quadricycles and other vehicles are made in Italy, so they're probably available in Europe."
"Up near the pier, you can rent quadricycles -- four-wheeled, roofed, pedal-powered carts."