When she's playing with her children, Sandra Kim's phone is nowhere in sight.
For instance, she puts it upstairs before going downstairs to play with her children. Kim, a stay-at-home mother in Fairfax, Va., to three children between the ages of 3 and 8, knows that she's no match for the allure of social media, text messages and phone calls. She also knows that whenever she peeks at her phone, her kids get upset.
"When we're playing, I call my husband to tell him that I won't be accessible for a few hours," Kim said.