Dawe, a paper sheet, is sensitive to the contextual lighting conditions, and acts by making sound. The student crafted the paper himself, seamlessly integrating the sensors and actuators: they are one body. Valle is Dawe's opponent. Valle has two slender limbs that end in a round-shaped form that faces Dawe. Valle is also made of paper. Valle acts by wiggling in different directions and causes a shadow by a light that is positioned behind it. It is sensitive to sound. Dawe randomly produces long musical notes, and when the light conditions change it crackles: its sound is more evident. Valle moves around, triggered by the sound, and its shadow caresses Dawe. When the sound is more evident, Valle becomes more active and the light conditions change more rapidly.