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Teenager constructs rollercoaster from 25,000 K'Nex pieces in his bedroom - and it takes a full 7 minutes to do a circuit | Daily Mail Online
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Anybody want to take over these 2 sets? 63045 big ball factory + 63030 Rollercoaster original : r/KNEX
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Amazon.com: K'NEX Thrill Rides – Web Weaver Roller Coaster Building Set – 439 Pieces – Ages 9 and Up – Construction Educational Toy, Multicolor : Toys & Games
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