People now easily share digital photos outside the home via web publishing and gift-giving. Yet within the home, digital photos are hard to access and lack the physical affordances that make sharing easy and opportunistic. To promote in-home photo sharing, we designed Souvenirs, a system that lets people link digital photo sets to physical memorabilia tagged with RFID markers. These memorabilia trigger memories and create opportunities that serve as social instruments for sharing. A person can show photos by moving the physical memento close to their large television screen, and the associated photos are immediately displayed. Alternately, they can bring a mobile computer to the souvenir, which shows the photos there. Using pick and drop, photos appearing on the mobile device can be quickly displayed on the large television.