We all know that children like to enjoy playing but the importance of it is being highlighted today right across the country.
The message behind it is that freely chosen play is vital for health, well-being and development.
With many councils facing cuts to funding leisure services, there's concern over the impact that may have.
Mike Griffiths explains
Morgan Jones Park in Caerphilly was one of several sites around Wales hosting a free Play Day of activities for children.
The scheme has run across the UK for more than twenty years