The Blewcoat School
Two reasons to visit the Blewcoat School, just by Victoria Station. First, it's an old building, built by a brewer to educate the poor (to 'read, write, cast accounts and the catechism') and it's free to get in. Second, the reason it's free is that it is the National Trust London shop, and they have some nice stuff if you are looking for a more unusual souvenir or gift. a win-win situation.