While infants have not fully developed their vision or movement skills, you can still stimulate their senses. Hand held toys as well as toys that are set up to play while the baby is lying horizontally and others that include lights and sounds are the best items to stimulate infants. A mobile or an activity bar that hangs over the baby plush stuffed animals while he is in his crib is a good toy to stimulate his senses. Whether these items have bright flashing lights or are just brightly colored, your baby will enjoy staring at these toys for hours. Soft sounds...