• 45 minutes to an hour at your own pace, with timed entry slots
• No strollers at the Madrid site, so bring a baby carrier
• Book ahead on weekends: walk-ins are possible, but ticket holders get in first

A play-and-photo attraction over three floors near Atocha, with more than 12 themed rooms made for touching, jumping and taking pictures. Kids jump into a giant ball pool, walk a bamboo forest lit by paper lanterns, wander among floating silver balloons and paint with light in a dark room.

There is almost nothing to read, so it works in any language.