The box is opened but unused plastic bags all sealed. The KNEX Clockwork Roller Coaster is a rare and unused 305-piece building set that allows children aged 7 and above to construct their very own roller coaster. Made of plastic and manufactured in the United States in 2016, this set features interlocking blocks and is part of the K'NEX product line. With a battery-powered design, this roller coaster set offers hours of fun and creativity for young builders. A must-have for fans of construction toys and roller coaster enthusiasts alike.
eBay