My grandma often took care of my brother and me when I was little. Most days she'd set us up with crayons or wooden blocks before going to iron or peel veggies. 

Grandma didn't hover over us but she was available when we needed her. 
These days there's pressure to engage children every moment. The other day I got a call while my (nanny) kids were climbing and sliding at the playground. I felt embarrassed to take it, worried that I might be judged for paying more attention to my phone than them.