The Gobbi Mobile is the third in the Montessori Mobile series. This mobile is introduced at three months when the infant is able to see the complete color spectrum. It includes five spheres covered in embroidery thread of a single color in graded shades from dark to light. The Gobbi Mobile refines the child's chromatic sense, develops and strengthens their visual descrimination, depth perception, and attention to detail. When hung, the darkest sphere should be closest to the baby's face and the lightest the furthest away.