需要的,4岁以下免费,不要逃票哦, First of all, you need to know that transport is free for children under 4 and half price for children between 4 and 11 years old.http://en.parisinfo.com/practical-paris/how-to-get-to-and-around-paris/public-transport-paris/fares-travel-passes-reductions
under 4 and half price for children between 4 and 11 years old.http://en.parisinfo.com/practical-paris/how-to-get-to-and-around-paris/public-transport-paris/fares-travel-passes-reductions