Having spent the last six months or so in Europe touring that continent's many natural history museums, we walked up to the museum desk with credit card in hard, prepared to dole out may fifty bucks or so for two admissions.
The guy looked at us like we were nuts.
"It's free," he said. Like we came from another planet.
Like who doesn't know that one of the world's most top-class natural history museums is open to the public, so people can come and go at whim.
There's a new wing that allows you to watch various scientific labs as they work on natural history questions, as they patiently brush away millions of years of detritus from fossils, or as they work on computers trying to solve problems in genetics.
Lots of these labs, at certain periods, are open to the public stepping in and asking questions.
Amazing. State of the art. For kids of all ages.