Excellent museum with really wonderful hands-on activities for kids and adults. Excellent displays on a range of topics from electronics and math to rocks and minerals and fossils to animals to architecture and playgrounds. A nice size to see in an afternoon or a day. Halls and rooms are a good human scale other than the old stairway which is a little low in the ceiling. Convenient access from the science museum rail station (green line) diagonally across the street and walkable from various directions and hotels.

Definitely recommend that you see a planetarium show, especially if - just a little biased here - our kid is the one doing the presenting 😎. And while you are by the planetarium, check out the display of the planets of our solar system in small metal form. They are proportionately sized though no longer spaced from the model of the Sun that's there as they used to be. This display is part of a geocache, "Solar System" (https://coord.info/GCB6DA).

Could have used a little improvement in terms of signage - was very difficult to locate the Eames/Mathematics room even though we'd been told where to go. And that one is not accessible while a lightning show is going on.

Similarly, the wonderful rock garden out front - which is free to view at any time, as you don't need a ticket - is interesting but the numbered map that used to be online no longer seems to be available. And there weren't any printed ones. I asked three different people at the info desk. Please put printed maps out, hopefully with blurbs on the back corresponding with the blurbs on the signs so that you can take it home with you or at least find things more easily. There is an official Earthcache associated with this rock garden, "Rock Stahs! - The Rock Gahden of MoS" (https://coord.info/GC3DEMV)

Very nice range of food options in the cafeteria, including some healthy yummy salads and burgers and pizza and sandwiches and fresh fruit. Interesting, extensive museum shop. Great view of the water from the tables in the back.

Plentiful, clean bathrooms. Appreciated the hand dispensers all over, with funny signs about washing your paws/claws. Also liked the funny signs when something was out of order.