When a 7-year-old learned his friend had cancer, he decded he could help raise money by racing go-karts.

One of the boy's heroes, Nascar racer Jeff Gordon, heard about his campaign and decided to help.

Gordon has already raised millions of dollars for kids with cancer.

To inspire his new friend, the star donated $7,000, doubling what Timmy Tyrrell had collected through his go-kart racing, and gave him a private tour as guest member of his pit crew.

(WATCH the Making a Difference video below from MSNBC)