Photos: Kate Middleton plays with her son, Prince George

23-months old Prince and his mum Kate Middleton were spotted having a fun time yesterday during a family outing to the Festival of Polo at the Beaufort Polo Club in Gloucestershire. His father Prince William, uncle Prince Harry and grandfather Prince Charles were also all there.
Kate Middleton, who gave birth just six weeks ago, was seen happily running after Prince George, who attempted to run up the hill. 

See the adorable photos after the cut...

Then his dad later joined him...