I think it's better to use an app that permits to play together with your son. At 5 years old he'll be happy to play with daddy, and you'll have precious moments both of fun and affection. What about Sortit? It's a logic game suitable for the youngest and it will be of interest for you too. Kids like colored balls and adults enjoy overall design and the concept. The further you go, the trickier the levels are. As for me, I enjoy this game but never felt addiction cause... cause this puzzle is not stupid. Only stupid things cause addiction, I think... so, I suggest you to give this edutaining title a try.