Sing a song
A couple of variations of song guessing games, where players take turns thinking of songs or words in songs and getting other players to guess, either by saying the song or singing it one note at a time. Very flexible activities that can be a lot of fun.
Hot or cold
A really simple hide-and-seek type game. It’s a good kind of quiet, not-too-disruptive game for little kids involving hiding an object and giving clues to help players find it.
Fortunately, unfortunately
A simple talking game. Players take turns telling a story, one sentence at a time, but each sentence alternates starting with “fortunately” or “unfortunately.” Silly, fun, a great time killer.
Paper telephone
This is a great party game for teens or adults. Kind of like a cross between pictionary and telephone, players write sentences, convert each other’s sentences into pictures, and back and forth until the results are hilarious.
Catchphrase
Catchphrase is a fast-talking guessing game, good for big groups of people. This post tells you how to play and includes some printable catchphrase word lists you can play with.