Location: Saffron Walden, CB10 1JL, Essex, England
"It is quite good, we liked the stuffed lion…"
It is a little local town museum, but it has lots of surprisingly good features. A stuffed lion, a stuffed hedgehog, lots of things to look at under microscopes, a sand pit, parking, lots of random old stuff. A small shop. http://www.uttlesford.gov.uk/museum it will entertain small children for about an hour.