Might be a bit of a trek, but my kids that age loved the Nintje museum though it's in Utrecht (40 min train ride from Leiden). Hope it's a fun visit anyway!

nijntjemuseum.nl/en/

Gotcha, yes a recipe for anti-fun!

What are the ways in which you're thinking it would be unfun more specifically? (Trying to collect as much nightmare fuel before lunch as I can, I suppose...)

Actually, the rest of that section also screams "SCOTUS is losing legitimacy in the eyes of the District Courts"

Love this

And I'd add, reinforce that the law on the books still matters beyond the law in action. Just bc a law prohibiting X is not enforced, that doesn't mean X is legally permitted. That still matters e.g. for shaping the arguments that can be made in the public sphere. (What's enforced isn't everything!)