This happy and playful musical composition, which reminds me on a child's play, is Chopin's Prelude No 26. Chopin published 24 preludes (like Bach, one in the each major and minor key).
Also the two preludes were unpublished and were discovered after his death.
In this video I recorded my playing of this prelude. It is played on the digital piano Casio Privia PX 850. My standard disclaimer: I'm not a professional pianist nor musician.
