Drag the age line from 4 to 16. The table, the hands and the tablet stay perfectly still — only what the app pays the child for changes. At nine, the gold star goes out.
Payment for the right answer — right until around nine
The same star, after it stopped fitting
Payment for the attempt
4-16 yrs
same child, four completely different jobs for the app
3 wrong
in a row — the test that reveals which age the app was really built for