Ben walker is running the distance of a marathon

My name is Ben and I’m 10 years old. I am raising money for my citizenship at school but I also want to fundraise money for G4 Neuro rehabilitation ward at Queen Alexandra hospital which my Nan is a patient at. My Nan was admitted to hospital on the 10th of August following a type of spinal stroke, we are hoping that she will be discharged before Christmas but she will be coming home in a wheelchair. This is a life changing event and my Nan has been amazing and brave throughout but she has had amazing support and care from all the staff on ward G4. Covid 19 has made things very challenging for all the patients on the ward, it cares for adults of all ages that are there for many weeks and months but due to Covid are not allowed any visitors at present. I would like to raise some money so that the ward can treat the patients to something nice at Christmas. I am planning to run the distance of a marathon over the next 4 weeks and then hopefully my Nan will finally come home.
I would really appreciate any help.