Jarvis was just 4 years old when he was diagnosed with cancer. Since then he's endured 3 years of daily chemotherapy and other painful treatments, meaning he's had to miss out on so much - birthday parties, swimming lessons. He hasn't had a chance to just be a kid.
Jarvis has wished for a tree house, somewhere he can escape the world of hospitals and have his own special space to play and focus on being a kid.
Jarvis has a very clear design of his dream tree house - it has to be two-storey, and come complete with flying fox and rock climbing wall!
But we need your help to make it happen.
Please will you help make Jarvis's wish come true by making a donation today?