• An adult for every two kids under 12, and groups stay at 5 people or fewer, adults included; from 12, kids can climb on their own
• Register online before a first visit through the Monk portal, and bring sports socks for the climbing shoes
• Cards only at the desk, debit or credit, so leave the cash at home

Monk is a bouldering hall: short climbing walls with no ropes or harnesses, over thick crash mats, with routes for first-timers up to strong climbers.

On Saturdays an open youth training takes non-members of any level, and trainers give each kid tips. Parents who don't climb can watch from the café, which looks onto the walls. Changing rooms, showers and free lockers are on site.