Visit Tokyo Toy Museum with your kids

Tokyo Toy Museum is a space full of wooden toys that are attractive for not only kids but also adults. There are traditional Japanese toys such as KOMA(spinning top), toys for playing house, board games, etc.
If there is a rainy day during your visit to Tokyo, and if you don't know how to burn your children's calories, this is the place to go.

The building used to be an elementary school, and was renovated into a museum.
It is 7 min walk from Yotsuya-Sanchome station on Marunouchi line.
Entrance fee is 500 JPY for children, 700 JPY for adults.

http://www.goodtoy.org/ttm/index.html