Kids ride a free slope car up the hill to a playground, a retired D51 steam locomotive and an old Tokyo streetcar, with three museums close by, one all about paper.
A playground to visit for the playground itself, with big structures and lots of ways to climb.
Once a forestry research nursery, now big old trees with trunks over three meters around, an adventure playground and a wading pool with animals set in the stone.
Free rides on a mini steam train, a tricycle yard, a sandbox and a covered kids' house with a ball pit, for kids up to the early grades.
There's a fountain plaza with a carillon, a campground of 18 sites, a basketball court and a pool of its own.
About 60,000 square meters of lawn, a playground with three big play structures and a net jungle gym, and a bird sanctuary you watch from an observation hut.
Thick lawns over gentle hills, a playground where kids with and without disabilities play together, a cycling course and an art museum.
Three children's parks with squirrel, pig and horse play equipment, a splash pond for kids up to third grade, and a cycling center, on 1964 Olympic grounds.
Rows of poplars and a metasequoia grove along a reservoir, with a bird sanctuary for birdwatching and about 14,000 irises.
Built as a large disaster-prevention base, with lawn and sports plazas, a barbecue area you reserve, and the old Komatsugawa lock gate in the Wind Plaza.
A sandy beach recreating the old Omori shore, a 30-meter roller slide, and a museum next door on the seaweed farming the shore was once famous for.
Locals call it Robo Robo Park for its colorful robot tower inspired by tin toys, at the south end of Roppongi Hills.
A broad artificial-grass slope kids sled down, a pond area for water play, several playgrounds and about 1,000 cherry trees.
A playground with a splash zone in summer, a short walk from the Lalaport mall.
Hills, a stream and a pond, with a sandbox, spring riders and a wooden play structure, and the metropolitan central library inside the park.
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.
Kids ride loaner bikes and tricycles past real traffic signals here, and a junk park holds a steam locomotive, a Toden streetcar, trucks and boats.
Pony rides, rabbits and guinea pigs to pet for free in the children's animal corner, and boats out on Benten Pond.
There's a giant Ferris wheel, a play area for under-sevens with nets and slides, a bird sanctuary with viewing huts, and the aquarium in the middle.
Exhibits on the latest science and technology, a Dome Theater with full-dome 3D films and a planetarium, and a Curiosity Field for kids and parents.
Picnics and shade tents on a wide grassy field, and a fountain and sprinklers kids play in through the summer.
A playground with lots of climbing and slides, contained and very clearly built for kids.
The train theme is the fun part here, with play equipment for preschoolers who love vehicles.
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.
A mini steam train that does three-minute laps, a real D51 locomotive in the traffic plaza, a play park and an outdoor pool.
Next to Shinagawa Aquarium, with a lake of seawater drawn in from the canal and an outdoor pool.
Two grassy hills and a big meadow along the Edogawa embankment, with a children's playground, a dog run and ball fields.
Free, with an outdoor exhibit on the Kanda aqueduct that includes a stone conduit rebuilt from the original.
The zoo, the national science museum and four more museums, and Shinobazu Pond, with lotus in summer.
A pond you can fish in, a big windmill, a splash pool for kids, play areas and a bird sanctuary.
Big wooden climbing structures, a Tarzan rope, a woodworking room and play leaders on hand, in an adventure playground run by the ward.
A cycling center with a cycling yard for little kids, fountains, basketball courts and a dog run across 54 hectares, on the site of the 1964 Olympic Village.
A pond near the Akatsuka castle ruins, next to a free local history museum with a late Edo-era farmhouse on its grounds.
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.
A gun battery the shogunate built after Perry's ships came, with cannon sites along the shore, the barracks site, a powder magazine and old cooking hearths.
Toddler play equipment, a plaza for ball games and a Japanese garden modeled on the Tama River and Mt. Fuji, plus a lookout where you can see the real Fuji.
Four floors of toys, with Plarail and Tomica on three and a 36-meter slot car track on four.
Wide, breezy waterfront paths and open lawns for scooters, bikes and a picnic.
A 40-obstacle field athletics course modeled on local historic sites, with a stretch over a pond, plus a separate free toddler course.
A round playground, a ginkgo avenue, a reconstructed Nara-period thatched house and a Paleolithic site, on hilly ground along the Shakujii River.
Small children get a shallow splash pool and a 607-meter cycling course with rental bikes, plus a tree-ringed lawn and a white prewar building at the main gate.
A Pick a Brick corner, a counter for building your own minifigure from parts, and a play table to sit down and build at.
Shelves deep in picture books and children's books, with original picture-book artwork always up on the walls.
A life-size blue whale and a D51 steam locomotive outside, and a T. rex and a Triceratops inside.
Sand and a rocky shore wrapped around a cove, with lawns, an observation deck, the Skywalk, and sunset and night views across the water.
Tomica cars and Plarail trains that pop out on a 3D screen, digital mini games, and a super-size Plarail diorama out front.
Pokémon goods with a Pokémon Card Station attached, and Pikachu Sweets by Pokémon Cafe in the same mall.
Formal, landscape and traditional Japanese gardens, about 900 cherry trees, and a greenhouse of more than 1,000 tropical and subtropical species.
Lawns looking across Tokyo Port to Rainbow Bridge, with ships for the Izu islands and big container ships going by, and a barbecue area.
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.
Magellanic penguins in a 350-ton open indoor pool, about 700 jellyfish, and a lab where you watch jellyfish being bred.
Penguins in a rooftop garden that look like they're flying over the city, plus great white pelicans and sea lion shows.
Artworks that wander out of their rooms and into each other, and a Sketch Ocean where the fish kids color swim off into the sea.
Shoes and socks off to wade through knee-deep water where projected koi turn into flowers when they bump into you, then on through rooms of light.
A Le Corbusier building on the UNESCO World Heritage list, with Rodin's The Thinker outside and more than 6,000 works inside.
A mirror-paneled building by Kazuyo Sejima, with life-size replicas of the prints, art games and a model studio with figures of the artist and his daughter.
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.
Japan's oldest museum, founded in 1872, with samurai swords and armor and a garden with five traditional teahouses.
An original 1927 Ginza line car and the first Marunouchi line car side by side, and a driving simulator modeled on a Chiyoda line train.
Gorillas, Sumatran tigers, pygmy hippos and Asian elephants, plus a children's zoo section called STEP.
