1. Card games
The humble deck of cards cannot be overestimated as a form of entertainment. It’s about as portable as it could be. It can be used for dozens of games at skill levels that will challenge people of all ages. And it can scale up from one player to a dozen (it might take a second or third deck for the really big numbers). With small children, there’s Go Fish. An action-packed game of cards for all ages is Spoons, which also requires the use of ordinary spoons. Or, if you have some bridge players, see if you can launch a holiday-long tournament. With a simple deck of cards, the possibilities are endless.