Sometimes it is found in Russian folk tales:
Ivan Tsarevich is given a task, and he is grieving, not quite understanding how to complete it! To this, Vasilisa the Wise consoles her chosen one: "Do not be sad, Ivan Tsarevich, the morning is wiser than the evening."

During the night, a fabulous magical girl solves all of Ivan's problems herself, and in the morning Ivan only enjoys the solved problems.
Thus, Vasilisa shows that there are no unsolvable problems.
Well, maybe she is very cool =) .

Although all this looks, if you think about it, not very pedagogically! Especially for children, to whom we read these fairy tales).