Journey to the Beginning of Time
Cesta do pravěku (original)
Four schoolboys go on an awe-inspiring expedition back through time, where they behold landscapes and creatures that have long since vanished from the earth.
Starring Vladimír Bejval, Petr Herrmann, Josef Lukáš, Zdeněk Husták, Bedřich Šetena
Watch "Journey to the Beginning of Time" on Criterion Channel released in 1955. It's a action & adventure and fantasy movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie.