Finlandia Hymn (from Sibelius’s Finlandia) on four electric toothbrushes, filmed lakeside in my beautiful home country, Finland. Finlandia, Op. 26 by Jean Sibelius is probably the most well known Finnish classical piece and Finlandia Hymn is a part of it. I decided to play that in my first outdoors video. This is the first time that I use batteries as a power source for the microcontroller and the toothbrushes. The microcontroller and the toothbrushes fit easily in my backpack.