The magic number of minutes is going to vary from family to family, and it can also be affected by the size of the screen, the intensity of the game, the socialisation of the game, the age of your child, and any special needs your child might have. (We’ve penciled in some examples in case it is helpful.)
The best way to determine a healthy amount of minutes for your child is to notice their behaviour at the finish line — and adjust accordingly next time they play.
Hint: Print the full download out to help them understand this concept, and hang it near the gaming station as a reminder of what you are striving for!