• Timed tickets only, valid for your booked slot with a 15-minute grace period; they can't be canceled, but can be rebooked online up to 10 minutes before
• Strollers stay downstairs in free storage at the wardrobe, and there are no lockers, so pack light: backpacks up to 45x35x20cm, no suitcases or shopping bags
• Airport-style security check at the entrance opposite Alexanderplatz S-Bahn station, with a metal detector and every bag searched

The Fernsehturm is the 368-meter TV tower opposite Alexanderplatz station, and its observation deck at 203 meters is the highest viewpoint in the city. Kids can pick out the Brandenburg Gate, the Reichstag and the Spree from the 360-degree windows, then try Berlin's Odyssee, a virtual reality trip through nine centuries of city history. The Sphere restaurant up top revolves while you eat.