7 Minutes a day is what's suggested...
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Free Touch Typing Program
Martian City Defender, a Free Typing Game
Outerspace Fleet Commander, a Free Online Typing Game
Spacebar Invaders, a Free Typing Game
Typing practice
TypingMaster Bubbles 1
free online typing copy practice exercises
Free Typing Tests - 1 to 5 minute Timed Typing Test
Meteor Typing Blast, a Free Typing Game
Save the Sailboats, an Online Free Typing Game
The Frogs are Off Their Diet, a Free Typing Game
http://www.freetypinggame.net/play3.asp
Typing Test
Here are some other resources that you can't find on the internet.