You are probably in the habit of packing sunscreen for a day at the beach or pool. But the sun is up there 365 days a year, and you need protection much of that time to reduce your lifetime sun-exposure total. Everyday exposure counts; you do not have to be actively sunbathing to get a damaging dose of the sun.
Protect your kids year round by teaching them now, how to protect themselves from the sun. Also anytime your kids are going to be outside do what I do, use the Coppertone Kids Continuous Spray, so you can make sure that your kids skin is safe!