This place is awkfullly empty, don't know what happened to all the exhibits. Even though it has many floors but if they really put all the exhibits together, probably they would all fit in two floors. I still remember coming here when I was a kid 20 years ago and it was full with decent exhibits. Things seemed to go way downhill after all these years. After some building renovation, most exhibits strangely disappeared, leaving a nice hall with not much to show. Some exhibits from my childhood was still here. What was left mostly don't work or in really poor condition. They do have timed exhibits like the mammoth which changed every once in a while. Those were good but instead of closing them down after a certain time period, I wished they left it permanantly open as the building was already so empty. The kids' supermarket was originally a great idea where my kids really enjoyed but the toy groceries all disppeared (stolen by people?) and now there is nothing left to play. Even with kids and a gold membership, we normally can't stay there for more than an hour (in terms of seeing the exhibits) as there is so little to see. We may go back once in a while for an IMAX movie due to the membership and if we are really bored but that's about it.