CAMDEN — "If you're happy and you know it, clap your hands!" 

A roomful of little voices sang the familiar childhood song, prompted by Kelly McLaughlin of the Southern Regional Lead and Healthy Homes Coalition, as they mimicked washing their hands. The length of time to sing the entire song, she explained to the 3- to 5-year-olds sitting "crisscross applesauce" on the floor in front of her, is just long enough to get those little hands clean.

McLaughlin was at CAMCare Heallth Corporation's Market Street facility on Tuesday as part of an effort to educate young children about the dangers of lead and other environmental hazards — and hopefully to educate their parents on the importance of getting their little ones tested for lead poisoning.