My friend is doing a nightly cocktail competition with her college daughters. They rotate who is in charge of coming up with the cocktail each night and then they vote on their favorite at the end of each cycle. You could do something with baking or cooking instead if you don't want to encourage the drinking.

DD and I go on drives, and I am planning more activities once classes are over. She loves painting so I will order her some paints and canvasses.