It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
ots opentechsummit berlin kalkscheune open source opensource conference linux free software freesoftware workshop coderdojo potsdam coderdojopotsdam kids code openxlab CoderDojo Potsdam coding workshop for kids CoderDojo Potsdam coding workshop for kids
Page 2017 Free-images.com. All images are Public Domain