As of 2015, Rapid Typing Zone offers a variety of games to increase typing speed, and is geared toward younger children. Learning Games for Kids is another source of games, and it is geared toward older children.
Rapid Typing Zone has a game called Word Mountain, in which the user types words that appear on the screen as a chick climbs a mountain. The faster the typist enters the words, the faster the chick climbs. The words increase in difficulty with each subsequent level. At the end of each level, the game shows the user's typing speed.
Learning Games for Kids offers a game called Typing Challenge, in which a typist must copy sentences that appear on the screen. The game buzzes with each error, and the sentences increase in difficulty as the typist passes each level.