Smile Trio: Who thought of this little song (2014)

Concept
Faces turn from frowns to smiles when people are near, then they start singing.
Keep these little guys company and make them happy.

SmileTrio-installed
Smile-Trio-Interaction

Photo credit (left): Faye Chou 

Documentation Video
This video from instagram well-captures the one to one interaction with a smile.

A whole view

Music 
By Gustav Mahler
Vocal: Seung Jin Roh (My mother), Piano: Soo Kyung Lee, National Theater of Korea, Recorded in 1968
1. Wer hat dies liedlein erdacht
2. Ging heut morgen übers feld
3. Ich bin der welt abhanden gekommen