Birth & up. This Infant Stim-Mobile® introduces babies to high contrast images and colors for early visual and multi-sensory development. Features 10 interchangeable graphic cards which offer a range of simple high-contrast images to complex colored patterns. The graphics cards help foster visual development and are labeled by age to guide you with recommended graphics to use as baby's vision develops. Infant Stim-Mobile® features an adjustable cord that allows you to easily change the distance of graphics from baby as their vision develops. 13" diameter.