natürlich! (SWR) - The sand collector (TV documentation)
UNDER CONSTRUCTION
Documentary about my sand collection (4 min)
Daniel Helber from Stuttgart has an unusual hobby: he collects sand from around the world. He has been archived at home 6,000 different types of sand.
https://www.youtube.com/watch?v=aiqJrtL3oF0
https://www.swr.de/natuerlich/
