More to explore:
The Natural History Museum in London
Childhood Magazine - growing up in Sacramento readchildhood.com
The Natural History Museum Paris
Hunterian Museum, Glasgow University, Scotland
Hermitage Museum St Peterburg, Russia
10 Things to Do with Kids in Sacramento, CA - Kids Activities Blog
Cristals Museum, Belem-PA, Brazil.
The Metropolitan Museum of Art
Rodin Museum Garden, Paris
American Indian Museum - New York, via Flickr.
The Sherlock Holmes Museum, London. I didn't go in, but I saw the outside. 221B Baker St.
Sacramento -> Crocker Art Museum