Sonic and Knuckles Chemical Plant Racing Tracks by Erector

Sonic and Knuckles go head to head in a race against one another at the Chemical Plant. This iconic racetrack comes complete with buildable Sonic and Knuckles figures, their signature motorized speed vehicles and the racing track and one Chaos Emerald to collect. The set features more than 165 parts and includes easy-to-follow building instructions, stickers and tools.

http://www.erector.us/