The Tokyo Water Science Museum is a great FREE hands-on, educational museum – a great spot to take the kids on a hot, rainy or cold day.
The museum takes about 60 – 90 minutes to tour depending on how much Japanese you can read and how much time the kids want to spend at the exhibits. As you enter you`re welcome to Wakuwaku Mountain and the Ukiuki Pool. Kids will love playing with the toys in the water, using the water spray gun to hit targets and crouching under the pool to look out from underneath at their friends. Note little ones may get wet. We recommend bringing 
an extra set of clothes. Parents/Guardians can relax at the seating area located at the far end of the pool where they showcase a film library, kids` artwork and water trivia while the kids play.
Head to the 2nd floor for interactive digital games that teaches kids how water enters and leaves our bodies or learn about the many wonders of water in their Aqua laboratory. The laboratory holds water experiments every 15 minutes, interactive games, as well as a large water filtration system display explaining the process to produce high-quality tap water. Outside the water laboratory is a hall with a number of exhibits explaining where water comes from, how it is processed and transported to homes. 
Kids will love installing water pipes via the interactive computer game, answering water trivia, and learning about the role of water in daily life via the small town showcase.
Visit the 3rd floor to watch a 15 minute video in their water theater. Watch the flow of water from the forest through a water purification plant to your home faucet then head over to their spacious forest-like space to learn about forest conservation, protecting water sources and answer trivia on their interactive Q&A board. End your visit on the B1 floor which offers a tour of the Ariake water facility.
The Museum has very limited English instruction, but it is not that hard to figure out the basics of what is trying to be explained. Stroller friendly with kid-friendly bathrooms. Food is not allowed in the facility. However visitors are welcome to eat on their outdoor lawn space on nice weather days. Also, located less than a minute walk from the museum sits Lohas Cafe Ariake – a family-friendly cafe with baby space.
The museum is located less than a 10-minute walk to the FREE Panasonic Center Tokyo. Visiting both is a great, educational day trip. Highly recommend.
P.S. Visit our Tokyo One Day Itinerary: Odaiba with Kids post.
Tokyo Water Science Museum Details:
Address: 3-1-8 Ariake, Koto-ku, Tokyo (135-0063 東京都江東区有明3-1-8)
Hours: 9:30 – 17:00 (Last entry 16:30). Closed every Monday except if it`s a holiday then they will close the following day. Also closed December 28 – January 4.
Phone: 03-3528-2366
Access: 10 minutes from Kokusai-Tenjijo Station on the Rinkai Line; 10 minutes from Kokusai-Tenjijo-Seimon Station; 13 minutes from Tokyo Teleport Station.
Website: http://www.mizunokagaku.jp/
Facebook: https://www.facebook.com/mizunokagaku/
Notes: Parking can be found at the TOC Ariake Building a short walk from the facility.
If you child loves science and technology, try these great museums and centers in Tokyo.
The Sumida Incineration Plant – learn about how our garbage is processed
The Tokyo Gas Science Museum (Toyosu, Tokyo)
The Ikebukuro Earthquake Center (Ikebukuro, Tokyo)
SonaArea Disaster Center (Ariake, Tokyo)
Tokyo Science Museum (Chiyoda)
Additional Tokyo Indoor Play Spaces for Kids – Tokyo with Kids
LEGOLAND Discovery Center (Odaiba, Tokyo)
Space Athletic Tondemi (Heiwajima, Tokyo and Makuhari, Chiba)
Tokyo Toy Museum (Yotsuya, Tokyo)
Aneby Trim Park (Odaiba, Tokyo)
Trampoland (Tokyo and Saitama)
Kidzania Tokyo (Toyosu, Tokyo)
Asobi No Sekai Bornelund, Grand Tree Musashi Kosugi Mall
Little Planet (Diver City Odaiba)
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The Tokyo Water Science Museum – A Fun Hands-on Educational Museum
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