(The Best Years in Life)Spring has a way of luring kids out of the house to play and get dirty. Cleaning them up and doing extra laundry may keep parents busy, but now they can feel better about the grime. Research is showing that kids who get dirty grow up healthier than kids who don't. Exposure to certain bacteria at young ages helps children develop stronger and more regulated immune systems and lessens the likelihood they will develop allergies. Read More.