Free, with Japan's money shown in order through its history and a corner where you feel how heavy 100 million yen in bills is.
A free zoo with red pandas, Humboldt penguins and guinea pigs to pet, beside the park's Japanese garden.
A patrol car, a police motorcycle and the helicopter Harukaze up close, uniforms for kids to try on for photos on the bike, and free entry.
Free, with an outdoor exhibit on the Kanda aqueduct that includes a stone conduit rebuilt from the original.
Free, with seven old fire engines in the basement, a retired fire helicopter at the entrance, another out on the fifth floor, and an Edo-era diorama.
An earthquake simulator, a smoke room, a storm of wind and heavy rain to stand in, and a VR disaster experience for second graders and up, all free.
Free, and kids ride out five kinds of earthquake (from age 3), find their way through smoke and try disasters in VR.
Minerals, fossils, animal specimens and century-old university furniture from the University of Tokyo's collections, plus a small chamber of curiosities.
Free, with about 300 preserved parasites over two floors, and the ones that infect people upstairs.
Free, with exhibits on the history of anime and how it's made, a booth to try dubbing, a theater showing anime and a library of videos to watch.
Free, with hands-on exhibits about water and a tour down into the working Ariake water supply station it sits on.
