I’ve only spent time in Amsterdam, but I do know they have a museum card.  Good for admissions to all kinds of museums.  If that’s your thing pick one up.  It’ll be worth it.  Sorry don’t remember the details as it was 1999 when I was there.  Check your guidebook or at the train stations.

Get a ‘museumjaarkaart’ (museum pass).
This wil give you free entrance in about 400 museums in Holland. I only costs 30 Euro.
You can get it a all participating museums (most major museums)
 

The average cost of entry into museums in Holland is €6.79 which is more expensive than neighbouring Germany (€6.54) but less than both France (€6.83) and Belgium (€6.92).
Over the last decade the cost of entering a Dutch museum has increased steadily at 2.00% per annum which is over double the rate of inflation, but half that of the inflation of Belarus (4.00%).
 
Querulously the number bicycles parked in front of Dutch museums at 12.30pm on Sunday afternoons has decreased by 0.6% in the last five years (figures dating from 14/03/2006) while bicycle ownership in the Netherlands has increased by the same margin in that time.

“Querulously”?
Are the bicycles squabbling or something?
Ann Frank House costs 8 euro.
Van Gogh Museum is 10. (Under 18 is cheaper for both.)
Maybe Tommo’s pseudo-facts aren’t that far off.
But I think I’d go with Hoonte and rmoore’s suggestions.

I hope you are not suggesting my facts are made up.
I can assure you that I spent a long time researching those facts and am confident that they will stand up to the closest of scrutiny.

“Querulously” is a word of my own invention.  It’s meaning is very similar (some might say identical) to “curiously”.
I hope that clears that up.


Ps.  I reserve the right to add words of my own making into any of my posts.