This site has a collection of several different games that can help improve keyboarding skills.
Hungry lizards with words on their backs are after Berry the hairy spider! Save Berry from these colorful, wacky creatures by typing words quickly as they appear on their backs and help her from becoming someone's lunch! Type in the letters or words you see on the lizard's backs as soon as they appear on the screen to clear them away. Some words will be harder than others so type really fast to win! Each round will end when the spider reaches the top of the tree.
"Alphabet Crunch is a keyboarding activity for elementary age students. Select a level of difficulty and begin keyboarding as quickly as you can to protect your lunch! Students must type the letters above the critters as they fall from the sky! Letters are introduced over a series of stages."