Why make a fuss about mud? Because getting dirty isn't just fun — it's good for children's health and development. Dirty play describes the unstructured, tactile contact children have with soil, mud, plants and the microbial life within them. Our previous research pulls together evidence from microbiome science, environmental psychology and early years education to show that regular contact with microbially rich natural environments supports healthy immune development, helps guard against inflammatory and allergic conditions, and nurtures curiosity, sensory development and a lasting connection to nature. In short, dirty hands today can mean healthier, more nature-connected children tomorrow.

Choose Play is working to spread that message across East Lothian — through outdoor play sessions, hands-on events like Mud Day, and conversations with families, educators and policymakers about reframing dirt as an opportunity rather than a threat. The aim is simple: help everyone see a muddy field not as a mess to avoid, but as one of the richest play spaces on offer.

So next time your child comes home covered in mud, know that they may be getting healthier and happier!