I visited this museum with my 9 year old and "almost" 7 year old, along with a large group of children and parents -- so we were able to get the group admission rate for the combination museum/Imax ticket, which was quite reasonable. As soon as we arrived, we noticed an area near the front door that was only for children ages 7 and under, which my younger child immediately wanted to visit. There was actually a museum employee standing at the entrance to the room when we arrived, turning away children who were older than 7 and not accompanied by a younger child (in fact, she asked for my kids' ages before she would let us enter). I very much appreciated that, as there were several groups of children who appeared to be tweens or teens who tried to enter, but were told they couldn't. My younger child loved this room! I believe he spent at least an hour in there. It contains many of the play areas you would find at a museum geared toward younger children, all in one spot. It can be a little tricky though if you have an older child with you, who will probably become bored very quickly. Luckily, we were with a group, so that my older child did not have to stay with us for the entire time in this room.
After we left the younger kids' room, I was pleasantly surprised by how well this museum is geared toward older children. We have been to many children's museums, and have recently been disappointed by the lack of activities that are of interest to our mature 9 year old. I honestly cannot say that he appeared bored for even a single minute at Discovery Place! I even enjoyed it myself.
We also saw an Imax movie during our trip, and our experience in the theater is the reason that I cannot give Discovery Place a full five stars. The movie was apparently oversold; and by the time our group entered the theater, there was not enough seating remaining to accomodate everyone. Several of the parents in our group ended up sitting on the floor near the rear of the theater, or on the stairs. This was apparently quite upsetting to the museum employee who was running the movie, which we were all made very aware of once the movie began. He got on his cell phone and very loudly chewed someone out as the movie was running, cursing frequently directly behind my children's heads. Many of the parents at the rear of theater turned around and glared at him, but he was undeterred until his conversation was finished. He was so loud that we couldn't even hear much of the beginning of the movie. The movie itself was wonderful and had the kids oohing and aahing, but this employee definitely ruined the experience.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.