Dirt is good for children! Many scientists now believe that an obsession with cleanliness is to blame for increases in allergies such as asthma, eczema, hayfever and childhood diabetes. Research shows that many children's immune systems are not being allowed to develop naturally and that being too clean can actually impair the skin's ability to heal.
https://www.gettingreadytolearn.co.uk/portal/themes/article/?id=34
