Children Who Play in Forests and Parklands Rather Than Gravel Yards Have Stronger Immune Systems

Finnish researchers added greenery and soil to daycare outdoor play areas.


  • Children got an immune boost and more diverse microbiota in the skin and gut.
  • The change supported the immune system and may prevent autoimmune conditions such as asthma, eczema, and type 1 diabetes


Daycares in Finland Built A ‘Forest Floor’ and it Changed Children’s Immune Systems. 2020. Science Alert (scientific article linked)