阅读下列短文，回答题：
InAmsterdam(阿姆斯特丹)，there is all unusual Children Restaurant．It is run(经营)by children．From themanager to the cooks，waiters andother members are all children from six to twelve years old．They themselves doall the necessary work such as cooking and cleaning．These children are selected(挑选)in Amsterdam．After training(培训)，theymay work in the restaurant for four weeks．All of themlike their work．
Thisrestaurant was founded(创办)in 1983 by a woman cook，who wanted to givechildren chances to learn tobe useful to the public．Andnow she is the only adult(大人)there，but her job is just to take care of the children．The restaurant is welcomed almost by everyone．Since there are only 20 seats in the restaurant，it is always fullof people．
If youwant to have a meal in the restaurant，you must tell them ahead of time"(提前)．The cost of a meal is different according todifferent people．Usually four dollars for each adult，but much cheaper for the children．Anditsbusiness hours are only on Saturday evenings and Sunday afternoons．
Where is the unusualChildren Restaurant7