How the blacksmith Paarvo shod the locomotive

Once upon a time, there were two brothers on the shores of the Bering Strait — enormous trolls named Burrebir and Birrebur, and they made a bet — whoever catches the sun and hides it in a bag.
And our world would have plunged into darkness if it weren't for the brave blacksmith Paarvo, who outsmarted the fierce troll — and he himself came out ahead. The tale of the outstanding Swedish-Finnish writer of the 19th century has not aged a bit — and returns to us in a modern guise.
Retelling by Mikhail Vizel.
For junior school age.