1.A felt covered head and has plastic feet2.Fluid inside condenses from the evaporative cooling of the water off the bird's beak， making it top heavy and dunking it back into the water3.The condensate rejoins the liquid pool in the bird's bulb， and he tips up again4.Process continues indefinitely5.The fluid and dye inside the bird can permanently stain， and the bird's glass body can easily be broken6.Children are fascinated by the bobbing bird， and the educational possibilities are great7.Color: Red