I'm easily distracted by shiny objects so I bead? And if nothing else, it's fun to sift through and organize by colors or type or whatever strikes your fancy if you aren't in the mood to put an actual project together. However, that requires some supplies, so not quite fitting your bill...

Hmm. Are you near a playground that has some sandboxes? All joking aside, it can be fun to create sand sculptures. Bring a bucket of water with you and have at it. (I suggest playground because I live nowhere near the ocean. If I were near the ocean, I'd say go to the beach.)