Using this Wimmer - Ferguson Infant Stim - Mobile is easy. First, hang it above your baby's crib using the adjustable cord. You can adjust the cord length to set the right distance for your baby based on their age and vision development. Select the appropriate graphic card according to the age label on it. As your baby grows, switch to different cards to keep stimulating their vision. When it comes to maintenance, since it can only be surface - washed, use a damp cloth to gently clean the mobile. Make sure to keep it dry after cleaning. Always check if the mobile is securely hung and the cards are in place to ensure your baby's safety. This product meets high safety standards, but it's still important to supervise your baby when they're near the mobile.