Tokyo Waterworks Historical Museum

One of Tokyo's biggest indoor play spaces, split into an ocean, a toy forest, a colorful town and a station, with a crawling garden just for babies.

Free to walk in, with more than 20 rides, among them a coaster that races between the buildings and the Big O, a Ferris wheel with a hollow center.

More than 60 vegetables, soups, desserts and drinks on the salad bar, next to grilled steaks, on the hotel's second floor.

Walk-around VR into future space travel, a spaceport-style hall you can touch, listen to and even smell, and a café under projected starry skies.

A playground to visit for the playground itself, with big structures and lots of ways to climb.