Cthulhu the solar powered emo robot
Solar powered bugbot, he has a small vibrating motor attached to a solar engine and solar cell. he soaks up light till he has enough stored up in his capacitor to run a short burst from the motor. when this happens he wobbles ominously on his many spindly legs.
in bright sunshine he leaps about all over the place and will dive floorward unless he is placed on some kind of lipped tray.