You need it if you are going outside, and everyone else in your family does too. This handy flyer shows you exactly what to look for on a bottle, how much sunscreen you need to use, and why you need to use it.
Another reason to put sunscreen on your list: sunscreen expires after 3 years or so. If you are like a lot of people, you have some old bottles sitting around. It may be a good idea to start fresh.