This app was mentioned in 2 comments, with an average of 3.00 upvotes
I've started a toy app (a game) where you are given an image from instagram and 4 hashtags from which just one is the correct one for the picture. It has a lot of useful code to start understanding android development and we could add more features, like a timer, gamification or whatever. Here is the code, feel free to do pull requests!
https://github.com/silva96/guessthehashtag
And here is the app in the playstore, install it to see what it looks like
https://play.google.com/store/apps/details?id=com.silva.benjamin.guessthehashtag
He needs something to make him think, but not stress him. Like a guessing game, I think my app would help him https://play.google.com/store/apps/details?id=com.silva.benjamin.guessthehashtag the only problem is you need to login with instagram, perhaps your instagram