NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California unveiled its mystery to the public, but only for two days beginning Saturday as an Open House to show JPL's past, present and future. The annual Open House event has attracted children in particular. Thousands of people, many of them parents taking their children, drove to world of warcraft power leveling, the JPL early on Saturday and Sunday morning world of warcraft power leveling and waited in long lines for a chance to park their cars. JPL keeps its door shut the rest of the year. Even reporters have to show their US citizenship to get in for an interview. But in the early morning on Saturday, anyone can get in after a security check-up. No IDs will be shown, no questions will be asked. The purpose is to light the interest of the younger generation for the exploration of the universe. Today's young visitors could be tomorrow's astronauts to land on the Moon or on Mars. At one booth, over a dozen of children were lying on the ground. Scientists were operating a mimic Mars rover to roll over their body. "This is the way for the children to feel how the Mars roller works," said one scientist. On her side, a father was patiently advising his daughter to maple story mesos, lay face down to feel the wheels of the rover over her back. In a big tent, several Mars rovers were moving between rocks maple story mesos. With visitors watching closely, the rovers move over the rocks while still keeping balance of the vehicle. When one wheel hits a big rock, it can lift the wheel to let the whole vehicle move over it. The event, themed "Worlds Beyond," features displays and demonstrations from numerous space missions, and a first look at JPL's recently renovated von Karman Visitor Center. The biggest attraction is wedding dresses, the JPL -built Wide Field and Planetary Camera 2, retrieved from NASA's Hubble Space Telescope last year by space-walking astronauts. The instrument, affectionately known as the "Camera that Saved Hubble," is wedding dresses on loan from the Smithsonian Institution's National Air and Space Museum. The camera captured many of Hubble's iconic space images. The historic Wide Field and Planetary Camera 2, developed and built by the Jet Propulsion Laboratory for NASA's Hubble Space Telescope, has arrived at world of warcraft power leveling, JPL in advance of this weekend's annual Open House. "It was 17 years ago this month that this camera left JPL on its way to Earth orbit," said John Trauger of JPL, NASA's principal investigator for world of warcraft power leveling the camera. "It looks almost brand new -- which is remarkable when you think it spent over 15 years orbiting 353 miles straight up," he added. The Wide Field and Planetary Camera 2 was the workhorse camera on Hubble after being added to the observatory in December 1993 to correct an imaging problem created by the telescope's faulty primary mirror. During its tenure aboard Hubble, the camera produced most of the stunning deep space images ever released. Its high image resolution and quality are some of the reasons the camera became the space telescope's most requested instrument during its operational lifetime. The Wide Field and flyff penya, Planetary Camera 2 was the Hubble Space Telescope's longest serving instrument with 15 years aboard the observatory. The newly-built von Karman Auditorium with 420 seats hosts viewings of the video "Journey to the Planets and Beyond," presenting an overview of JPL, its history flyff penya and its missions. Other Open House highlights include: JPL's next spacecraft bound for Mars; Mars Science Laboratory, under construction in the lab's largest "clean room;" JPL's Microdevices Lab, where engineers and scientists use tiny technology to revolutionize space exploration. Another attraction is to show luna gold, how NASA instruments can help scientists better understand global climate change. One scientist held ice in her hand luna gold and the camera "sees" the change of temperature by showing different colors on the screen. Also, when she put a black plastic bag in front of her hand, the camera still can "see" through the plastic bag. The JPL Open House provides a memorable experience for adults and children, with plenty of hands-on activities, and opportunities to talk with scientists and engineers. To help those who can not come to JPL for the Open House, selected locations at the Open House are featured live online on Ustream TV at http://www.ustream.tv/channel/nasajpl on Saturday, May 15, at 10 a.m., 11 a.m., noon and 1 p.m. Pacific time (1, 2, 3 and 4 p.m. Eastern time). Each time slot will feature a new location at the top of each hour. Even staying at home, people can still participate in the event.