• Adult supervision under 14: one adult per child under 10, and one adult for up to two kids aged 10 to 13
• Unheated brick hall, so dress in warm layers from late fall to spring
• No games on the mats: tag, hide-and-seek and jumping around are banned, and babies who don't climb stay off the mats

A bouldering gym in a brick hall, open since 2013, with about 800 m2 of walls and blocks over thick mats. The 200-plus problems are reset every week in every grade, so first-timers and strong climbers share the space.

A passage leads to a second room of about 200 m2 for warming up, stretching and training boards.