My child has relapsed from osteosarcoma, he was learning how to walk on a prosthetic bone femur and with a leg discrepancy at this point the tumors have spread and he can no longer use a walker. He needs vitamin D and it's difficult to get around many places with a wheel chair if I can have a tandem bike I can take him to get fresh air in parks and other places much easier than pushing around a wheel chair.  

My child has relapsed from osteosarcoma, he was learning how to walk on a prosthetic bone femur and with a leg discrepancy at this point the tumors have spread and he can no longer use a walker. He needs vitamin D and it's difficult to get around many places with a wheel chair if I can have a tandem bike I can take him to get fresh air in parks and other places much easier than pushing around a wheel chair.