On the roof of an elevator and entrance to a bicycle storage I found these two creatures in front of the Public Library in Amsterdam.
From above I had a better view. On their back they have Solar cells. With that energy their body and eyes lighten up in the evening when someone uses the bicycle storage to give them a warm welcome.
It is a design by Marjet Wessels Boer from 2012 and she named them "ODE's blozers".
ODE stands for" Oosterdokseiland" the place of the art. Blozers means "blushers"
It was the result of a contest issued by the municipality of Amsterdam to design an art project that provided itself with energy.