They’re Back! Come back again to the time when giant dinosaurs ruled the Earth. The District is once again hosting the award-winning Jurassic Plant Tour Open House on Saturday, October 12 from 10-3. This free family-friendly educational event will highlight how all of the water on Earth has been recycled since the time of the dinosaurs, and before. Enjoy tours, Adventure Passport Education Stations, Dino-themed bounce houses, dino dogs and paleo pizza (while supplies last), all free of charge.