Although it is small compared to the Gwacheon Scie...

Although it is small compared to the Gwacheon Science Museum, there are other exhibits from different perspectives. In particular, the space shuttle Endeavor is a must see. It's not paid, it's free, and I didn't need to go on a weekday, but it seems like a weekend. There is a video showing the process of bringing the Endeavor to the Science Museum. IMAX next to it is paid and it's worth seeing. If you go on weekdays, you can enjoy leisurely.