My kid definitely does not miss school, but if yours is more academically inclined, introduce them to Kahoot! This free app and website makes learning fun by providing a quizzes, flashcards and challenges covering every subject and level of education you can possibly imagine.
There are millions of ready-to-play games available for free, and if you want, you can make up your own quizzes and let other people give them a go. But the real fun of Kahoot! comes in playing live online, matching wits with others in order to claim total academic dominance.