For the most part, the children are pretty good about self-regulating their device use, and balancing it with other activities. The annual doctor appointment goes a long way, so they are not just hearing it from us!
The inspiration for this cartoon was when my son was having trouble moderating, and confiscation of the device was required. To his credit, he channeled the experience to a creative outlet, and came up with the concept for this cartoon. He also posed for it, with our beloved dog Macho, who I think was also delighted to finally get a spot in the family chronicles.
The other thing that is special about this cartoon is that the scene is at the top of our stairs, so those windows are the ones the children see each time they bound down the steps to start their next adventure. When I showed the sketch to my little girl, she lit up, "Hey, those are our windows!"