http://www.rahamuseo.fi/english/index.html
The museum is simple, fun, and best of all free. I have been there a few times. I just realized today that I never posted the link. One item of interest for you closet bean counters is the "money converter". It is primitive and focused on the Finnish experience, but you can play with different items, figures and such between years to see what yesterday's item would cost today. (Check for the english link at top if you load the "game".)
http://www.rahamuseo.fi/english/multi_laskuri.html