They’ve achieved new knowledge. Help them steward that knowledge well. Give them Proverbs, a book on wisdom teaching humans(and grads) how to live well in the world. Or the Notebook—for reflection on post-grad hopes, dreams, and callings.
The most meaningful gifts are the unexpected ones. Maybe it’s for someone whose just checking out spirituality. Or maybe it’s for someone in your community. Whatever it may be—we hope it has an impact.