Over the past few months, thousands of migrants and refugees have been travelling to Europe.
Many are trying to escape from countries affected by war such as Syria, Afghanistan and Eritrea.
Some say they're coming to Europe looking for better opportunities for their children. But some European countries are struggling to look after so many new people.
Leah is in Germany for us all this week meeting those affected by the migrant and refugee crisis.
She's been finding out what impact the arrival of so many people is having on German kids.