Knex Turbo Snail By 18efroese in LivingLEGO & K'NEX1,4456Introduction: Knex Turbo SnailBy 18efroeseFollow More by the author: About: Mechanical Engineering. Inactive? More About 18efroese » I came up with this while watching a commercial for the new Turbo movie. If you have any questions or recommendations just comment! Step 1: BodyStep 2: Shell