Ludo is a children's game created in late Victorian times and based upon the ancient Indian game of Pachisi. There are other Western versions of Pachisi such as Parchs from Spain, Parcheesi from the USA and Uckers, a form of Ludo played in the Royal Navy (and apparently some non-British navies) on a Ludo board.
Sam can be seen wearing a cast on his hand/wrist. Jared Padalecki injured his hand during a stunt in 2.03 Bloodlust (2006) and began filming 2.04 Children Shouldn't Play with Dead Things (2006) before it was diagnosed as being broken.
Jared Padalecki broke his wrist while filming a stunt during Season 2 of Supernatural. The writers ended up writing in that Sam had broken his wrist while fighting a demon in order to cover up Jared's cast.