The expectation our family had upon arriving was a history lesson that would help fill in the gaps on historical things we did not know. As it turn out we knew more history than what was shown. The beginning of the exhibit was impressive. The room of the Ghana slave port castle was great. Once we left there it was down hill the rest of the way. The rooms that followed were filled with artifacts, some real ,some replicas and other that made no sense. Each room had a theme, which most of the time went off track. The most confusing being the "Music Room"? The best part of the exhibit was the ending short film. In whole it was as if the exhibit was not completely done. Too many people and contributions were left out. Especially in the fields of medicine and science.It was as if Dr. Charles Drew, Dr. Ben Carson, Benjamin Banniker, Eli Whitney and George W. Carver did not exist. We could have done better taking our children to the library. We didn't pay for the audio tour guides, and it was a good thing we didn't. People around us were having problems getting them to work properly. An audio loop for each room would have been better. Oh and by the way, WHY CAN'T YOU TAKE PICTURES!