What is a good Thank You gift for a team of Oncology nurses and doctor who treated my Cancer ??

I have just finished Chemotherapy and the staff and the docotor have been Amazing to me,today they brought some baloons and a card that they had all sigend it for my therapy completion...I was really touched...I REALLY NEED A GOOD IDEA TO THANK THEM BACK ...plzzz tell me ur ideas...tnx alotttt