The Science Fair is a location appearing in the TMHT adventure comics. It is held inside a large exhibit hall in New York City. Numerous scientific inventions are displayed at the Science Fair and it is on Donatello's suggestion that the Turtles attend.
One of the first exhibits they visit is a complicated machine that basically boils eggs. The Turtles next stop is at a device billed as the "Instant Food Machine". The inventor offers them an opportunity to try out the machine, and the Turtles all order pizzas, which are instantly produced. The Turtles finally attend the big presentation held at the Science Fair, which is the unveiling of the Bubble Gun. All goes well until Shredder makes an appearance and disrupts the Science Fair. Bubble Trouble