Celebrities and athletes often hold events and donate their time for charity, but it’s not often that one will climb a mountain in the name of children.

This week, Ray Lewis pledged to climb Mt. Kilimanjaro to raise money for children in East Africa. More specifically, his “TackleKili” fund will raise money for clean water projects for children in Africa. As an incentive, Lewis will be giving away an autographed helmet to one random fan who donates or spreads the word about the fundraiser.

The retired NFL linebacker and Super Bowl champion announced his intentions on Twitter and on his website, saying:

In one month, I will climb Mt. Kilimanjaro in Tanzania to raise money and awareness for clean water projects in East Africa. I am so FIRED UP for this adventure, but until then, I need your help to bring clean water wells to thousands of children and families. Show your support by following my TackleKili journey, spreading the word, and donating to TackleKili. Each action you complete below earns you more entries to win my autographed helmet! Thank you for your support and good luck!

To earn entries into the contest, fans can follow the new “TackleKili” Twitter or LockerDome pages (2 entries), or spread the word about it over Twitter (5 entries). Those who donate at least $10 to the fund can get 52 entries into the contest.