Looking for interactive, inventive fundraising ideas for a charity sporting event? Take a cue from a 12-year-old in Florida.

Seventh grader Torii Robertson hosted the first Bumps for OCC, a volleyball tournament to benefit Operation Christmas Child, the Seminole Chronicle reports. The non-profit organization provides shoeboxes filled with gifts for children in need across the world. The charity sporting event was held in late August. During the 12-hour tournament, participants raised money for the number of hours they played.

Torii’s strategy for conceiving the fundraising idea and planning the event was based on a few principles: