Babies and small children do not handle dry air as well as adults. Their skin and airways are still developing, which makes them more susceptible to nasal congestion, poor sleep and skin irritation. This is why many parents resort to using humidifiers — appliances that help increase relative humidity by releasing moisture into the air. When used correctly, humidifiers can transform the arid indoor air and help little ones breathe more easily. However, not every appliance is safe to use in nurseries or toddlers’ rooms. By their very nature, humidifiers can cause dampness and contribute to mold growth if they are not cleaned and maintained correctly. They can also spread impurities if the water in the tank is not distilled or purified before being released back into the air. Moreover, many appliances generate warm mist or steam that can burn a child if they get too close. Not to mention, most humidifiers simply do not have the looks that would suit a child's room.…