The historic fountain at the east end of Balboa Park’s El Prado pedestrian walk is a lure for visitors, thanks to its majestic and cooling spray. But a quick turn to the right is the entrance to the Reuben H. Fleet Science Center, another local draw. For the young, it’s a two story, interactive science playground. For the young at heart, there are sophisticated displays, rotating exhibits and the new, NanoSeam IMAX Dome Theater. Films splayed across the 76-foot wraparound screen plunge viewers into the depths of the sea and out into space, through jungles and between skyscrapers around the planet. Resident astronomers also create new shows monthly, using the latest SkyScan System software. The café near the entrance takes care of hungry visitors with a modest menu, a few tables indoors and patio seating in front of the fountain.