Most kids learn to type by looking down at the keys and poking with two fingers. It gets them by, but it never gets fast, because their eyes are doing the work their fingers should. Touch typing works the other way round: each finger owns a few keys, the hands rest on the home row, and the fingers learn where everything is. Once that muscle memory is in place, speed comes on its own, and it stays.
Typing Hero teaches it the way a patient tutor would. Every drill shows a keyboard and a pair of hands on screen with the right finger lit up for the next key. As your child gets confident, the keyboard fades out first and then the hands, until they are typing from memory. Drills stop on every mistake so the wrong key never gets rehearsed, and Sky Flights turn the same lesson into an arcade round, with the right finger still shown on screen, so good habits are what earn the stars.
You get a Parent Zone behind a PIN with a progress report for every kid: which keys are solid, which are slow, and a heatmap of the keyboard showing where the misses happen. There are no ads, no chat and no public profiles, and your kids' names are never shown to anyone outside your family. The only exception is the leaderboards, which are off unless you switch them on for a hero, and then they post the hero's made-up name and face, nothing more.