I agree with dailydi, you, YOU are the parent, so parent them, take them away, make them have a tech free day, my niece and nephew have them, for a day they go without playing games or checking their phones or messing with their ipods, you say you tried to give them family values, if they aren't taking them, they need an incentive, getting their gizmos back would be a good one, and when they get them back give them limits and if they break those limits, they lose them longer next time.