I love the Science Center, even as an adult! They have so much to offer and frequently rotate their exhibits to keep people coming back!
Each floor is designated to a different area of science, and there are countless things to explore. One of my favorite exhibits is the Miniature Railroad and Village. This is a tiny replica of Pittsburgh, displaying the history and changes that have occurred over the years. The display is shown in various lighting to mimic the time of day and to provide an all around immersive experience in the replica.
The Science Center hosts 21+ nights on a regular basis that provides adults and parents alike the opportunity to explore and engage with the exhibits without the addition of small children. This gives it a completely different vibe, especially when they have one such as the history of body art and they tattoo on the third floor! Such a fun experience.