If you've not come across it already the Disney Junior Appisodes app is a great way for youngsters to get into gaming. The app splits episodes of popular Disney Shows, like PJ Masks and Mickey Mouse Clubhouse, up with different gaming challenges.
As you can see in the PJ Masks Catboy and the Shrinker episode these range from simple interactions to solving a series of mazes or memorising dance routines. Most of these are too simple for older gamers but for youngsters are an excellent match.
Also, because the game is split up with cartoon content it makes for a nice way to enjoy stories they have seen previously on TV. The familiarity really lowers the barrier to entry.
The episodes are purchased separately with one coming for free when you download the app.