Babies see high contrast images first, particularly those in black and white. This mobile will mesmerize your baby from around 2-3 weeks of age. The 2 levels help your baby learn to focus at different distances, while the motion as the mobile moves in a gentle breeze or to your touch lets baby learn to track moving objects. Hang it over a changing table. It will help calm your baby through those first changes. When your hands are full, blow on the mobile to make it move. Package size: 22.5 x 22.5 x 0.5 cm