Some of the UK's national museums (links to Twitter accounts are in italic).
The list is ordered by the number of twitter followers. This isn't an entirely fair way of ranking, but it does give a combined measure of the number of people interested in the museums, combined with activity.
Brighton Toy and Model Museum is a World-class repository and display environment for early toys and models situated under Brighton Railway Station, on England's South Coast.
The museum is a Registered Charity (1001560), and depends on volunteers, ticket sales, donations and bequests.