I got to know this song exactly one day and a half before and immediately had to learn it by heart as fast as it was possible! My Russian teacher showed it to me, I LOVE it!! It's from a Russian televsion series called "Guests from the future" or such a thing. And I fell in love with these cute kids who play pupils in such cute school uniforms!! I also always wanted to wear a school uniform, but in Germany it's not quite common at all.... Well ... it wasn't easy at all to sing these wonderful high notes ... children's voices are better to sing this song.
Btw I love the lyrics! They're worth a glance!