• Zero Gravity Room extra: €2.50 per person, not recommended for kids under 5, and you can't go in carrying an infant
• Plan about an hour, the average visit; last entry is one hour before closing
• Under-13s need an adult with them, so older kids can't be dropped off alone

An illusion museum with more than 40 hands-on exhibits that play with perspective, gravity and mirrors. In the Zero Gravity Room the floor tilts until up and down feel swapped, the Paradox Tunnel makes walking straight feel impossible, and the Infinity Room surrounds kids with endless reflections.

Many exhibits are made for photos, so bring a phone. The Paradox Boutique sells brain teasers and small snacks.