Puzzles help you to think about words, their meanings, and their relationships to other words.  I find it to be an excellent meditation tool.  Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things. (Php 4:8)  God's Word fits these guidelines better than anything else.  So think about Proverbs 31 and have fun doing it!