Nine-year-old Lily-Mai Gordon was left devastated by the death of her grandfather from pancreatic cancer.
But the big-hearted youngster from Wakefield was determined to make a difference in the battle against the illness and has so far raised more than £1,100 after being inspired to launch her Goodbye to Cancer campaign.
Under the venture, children are asked to make loomband bracelets for grown-ups who donate money and snap a selfie waving goodbye to cancer to share on social media before nominating friends to do the same. Already fellow pupils at Normanton Altofts Junior School have become involved and the effort is being backed by Cancer Research UK.
Her mother Ali Gordon said her daughter had promised in a message in her diary to her grandfather Alan to find a cure.
A number of celebrities have pledged support for the campaign which it is hoped will gather momentum online.
For further information about the fundraising go to www.goodbyecancer.org and www.justgiving.co.uk/goodbyecancer.