We planned a visit to HMNS on a vacation to Houston. I wasn't too excited at first because we have been to a bunch of science museums and I usually find them boring but this one was awesome! My daughter and I spent the entire afternoon at HMNS while my husband and son went to an Astros game, I could have stayed longer! Seashells, Gems and Minerals, Butterflies, Planetarium, the animal exhibits, curiosities...there was so much to see and learn! We were there until they closed and still didn't see everything. We did not go through the dinosaur part but looked down from the overlook. We also did not do the special exhibits or the movie. If you want to see it all, plan the entire day!! We loved it!!!! The gal at the ticket window actually recommended that we get a membership, it saved us about $25 on our admissions, it also saved us money on snacks and in the gift shop. So I now have a membership and would love to go back but we live in Delaware so unfortunately it's a little too far. I highly recommend this museum to anyone in/around Houston and to anyone vacationing there!!!!