In a move that is probably intended to help it compete with other ereaders and tablet devices, Amazon is now offering a couple of free word games on its Kindle devices. The games are Every Word and Shuffled Row. Both games are free to download to your Kindle device.
Here are some related items that may be of interest to you:
HeyZap – Strategy Games for Your Class Website
ABCya – Fun, Educational Games for K-5
Smart Kit – Puzzles, Games, and Riddles