Boston researchers watching families at fast food restaurants found that parents often paid more attention to their smartphones than to their kids.
And if you think kids didn't notice, think again.
The youngsters were more likely to test the limits when mom & dad were absorbed by the phone.
Some even tried to get their parents attention, to no avail.
Experts suggest parents 'unplug' from technology when they're with their children.
"Children really need that interaction and the best thing for developing minds is to build that relationship where the parent is looking at the child, where the child is looking at the parent, they're engaging in conversation," says Dr. Emily Schulte, a pediatrician at the Cleveland Clinic.
The American Academy of Pediatrics is now working on guidelines for smartphone use around kids, just as it has advice on TV viewing.