What a disappointment. Expensive, huge, poor signs, very hard to navigate. 1st floor is on the top - who's idea was that? Many exhibit things broken. Huge rooms that were turned into mazes by the way the exhibits and walls were arranged. The worst was a massive (huger than huge) " kids exploring room" that was totally disorganized, unsupervised, filthy with papers and garbage onthe floor everywhere, noisy, much over- loaded with kids and parents running around after them. I lost sight of my 3 kids and it took me about a half hour to find them in the maze and gather them up. One of them could have easily been whisked off by a perv or kidnapper, or they could have become lost and frightened and wandered out, since there were several exits from the room and non were in any way supervised. Was glad to get out of there in one piece.