The rewards system for many games has been horribly screwed up. Constant small rewards are common on most mobile games, rather than the segmented rewards of old games where often the more effort was required the bigger the reward. The kids have little to no concept of payoff and expect a constant flow of action to reward. Suika Game, which was recently popular, is a prime example. Nearly every time you drop a fruit a reaction happens and you get a small reward. This also seems to be creating a general impatience I'm seeing in children where if there's downtime or slow segment they start looking for other forms of stimulation. It honestly makes me very worried because that behaviour might be extending to their everyday life rather than just with videogames.