• Weekend inventor's workshop runs Saturday and Sunday 11am-4pm, with limited spots, so expect a wait at busy times
• Arcade playcard costs 50 kr. at the ticket desk and unlocks every machine; some games are free to try without one
• No prams in the exhibitions, though strollers are welcome, and backpacks and large bags go in the cloakroom lockers

ENIGMA covers communication history, from the Danish postal service of 1624 to the internet.

Kids can crawl, slide and type through Teleportalen, a play area that turns the digital world into a physical one, and design their own stamps. The basement arcade has Atari, Nintendo, C64 and Amiga games to play. Older kids can crack Enigma machine messages and head underground into a Cold War bunker.