Treasure on the Bottom of the Lake
Käuzchenkuhle (original)
A young boy Jampoll is spending the summer in his grandfather village where he fights criminals using his friends help.
Starring Martin Flörchinger, Manfred Krug, Regina Beyer, Dieter Wien, Thomas Langhoff, Vera Oelschlegel, Peter Pollatschek, Nico Turoff, Gertrud Brendler, Berko Acker
It's a kids and action & adventure movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Argentina.