After lessons in mindfulness at his primary school helped him cope with losing his cousin, Harvey became determined to help the organisation that made them possible.
The unnamed child, who celebrated his fourth birthday on Saturday, was hit by a car in Farranshock Estate, just 2km from the town of Mullingar, Ireland, not long after 6.30pm yesterday.
The teenager had been travelling in his father's Peugeot van on the motorway between junctions 34 and 33 when the terrible crash occurred shortly after midday today.
The devastated parents of a six year-old boy who died from hidden cancer in less than a year have urged others to seek advice for childrens' ailments - even if they seem harmless.