Spend Labor Day weekend with David Ortiz! Or rather a corney likeness of the retiring Red Sox slugger. The Big Papi Maze at Davis Mega Maze opens Saturday. The maze is open 10-6, with Laser Tag 12-6 and Zipline is open 10-6. Each with separate admissions rates. One free zipline ride is included with your paid admission to Davis Mega Maze or Outdoor Laser Tag.