We spent six hours here with children ranging from 12-18 years old. The older children would have stayed longer if time permitted. This is a very hands on museum, with exhibits ranging from dinosaurs through gems to recent important discoveries in science to the solar system and human anatomy. There were things of interest to all the children: especially popular were the exhibits where you could do some sport activity and have your throw or racket swing or kick reduced to slow motion--You could then compare your swing frame by frame with a professional athlete's--; the machines that measured the electrical impulses in your thoughts; the tables with robots to engineer and then play with. We have gone through science museums in New York, Paris, Washington, DC, Chicago, and Baltimore, and this museum's only rival is the Franklin Institute in Philadelphia. The building itself is fascinating, with an escalator surrounded by windows and an ecologically friendly roof. The cafeteria had good eating options, and was reasonably priced. All in all, a fascinating visit for children and adults (who can read about discoveries of Nobel Prize Winners) and do additional activities on a tablet loaned to you (you have to surrender your driver's license).