In this game, being excessively wordy is a virtue.
Everybody gets a pencil and paper. Someone has to be the timekeeper (a good job for a grown-up). The timekeeper picks a letter, tells it to everyone else and shouts "Go!"
Players write as many words as possible that start with that letter. When a minute is up, the timekeeper says "Stop!" and all the players put down their pencils.
Whoever has the most legitimate words wins. Decide in advance whether you can finish writing a word you've already started when the game ends.
Now, give everyone one more minute to write a sentence with as many of the words as they can.