Newborn kittens weigh just a few ounces.  Their eyes and ears are shut but they could smell very well.  Newborn felines depend on their mother to nurse them, keep them warm and stimulate elimination. By the end of the first week, their weight should double and their ears should open.  During the second week, their eyes will open to. Hearing and vision still need time to develop. At about two weeks, they get their baby teeth and those tiny legs, try to walk. By four weeks, kittens get playful and begin walking and climbing.  They can eat some solid food and eliminate on their own. By six weeks, kittens have all of their baby teeth so they can be weaned. This is also the time when their blue eyes begin to change to their permanent eye color. Now it’s time for you to give them all of the cat toys and cat treats that they want.