Just a little sun safety reminder. Many people are under the impression that sunscreen is only necessary when the sun is shining, however, teach your children that it should also be worn on cloudy days, since damaging UVB rays can still get through the clouds.
Make sure your kids use a broad-spectrum sunscreen (i.e. one that protects them from both UVA and UVB rays), that has an SPF of at least 15. Kids should also be taught to reapply sunscreen every 2-3 hours, and/or after swimming or sweating.
Lastly, get your kids into the habit of checking the expiry date on the sunscreen bottle before they use it, as the ingredients in sunscreen become less effective over time and will likely not protect them adequately if used past the date shown.
For more information about sunscreen, how to choose it, and how to use it for maximum effectiveness, check out this article by the Canadian Cancer Society.