My family has played a word game every Christmas since the early 60s. It was called Starlog and is similar to the boardgame Mastermind which came out in 1970 but uses letters rather than coloured pegs.
One player decides on a word of 5 letters which are all different (such as PRICE). The other players have to work out what the word is and take turns to say a word to that person. If any of the letters are in the same position as the word that counts as a star. If any of the letters are in the word but in a different position that counts as a dot. The person who has decided on the word says how many stars and dots there are.
The winner of the round is the person who works out the correct word. In our family the person who thought they had the word would show it to the lead person who would say it's right so that the other players could keep on trying to work out the word. Once everyone had worked out the word (or given up), the next person would decide on a word to be worked out.
The only equipment needed is paper and pen/pencil. The game can be played with 4, 5, 6 or more letters but 5 seems to be best.
For anyone who likes logic and word games, this is one of the best games ever.