• Adult supervision under 16, since kids younger than 16 must come with an adult who actively watches them climb
• No booking for open climbing, and no time limit on a visit; only private instructors and group classes need registering
• Shoe rental for €2, though regular sports shoes work too; climbing barefoot is not allowed

BONOBO is a climbing gym with more than 100 bouldering problems and a 10-meter lead wall fitted with four auto-belays. A team of route setters changes the problems every week, so repeat visits stay fresh.

There's also an adjustable Kilter Board, a separate training area, and a bar with coffee, drinks and snacks where parents can sit while kids climb.