Students of foreign universities who are citizens of Member States of the European Union, the Swiss Confederation and Member States of the European Free Trade Association (EFTA), who are under 26 years of age, can use the discount card without communication.

Yes, it's enough if you have an ID card that confirmes child's age.

Yes. On the basis of the student's ID card (it is presented at the museum at the request of a facility employee), you can purchase a Poznań Tourist Card at a reduced price. This also applies to young people from abroad.