I'm worried about DD's increased obsession with our iPad. She's 22mo and we first let her use it a few months ago on a transatlantic flight. Since then she has become increasingly obsessed with it, or rather the things on it - toddler apps (most of them educational), but she's mostly interested in watching Peppa and nursery rhymes and asks for it all the time She's gone from having no clue who/what Peppa is to an addict in two months 
It makes me sad because until recently she was interested in a variety of play activities at home - drawing, stickers, make believe, etc. Now she'd rather watch or play on the iPad. And I just got a text from our childminder saying she's been asking to watch it at hers.
I guess I could take it away all together, but it is handy at times. I suppose I'm looking for reassurance that it's not going to stunt her imagination and general cognitive development! If you can't guess, she's our only DC. iPad is her only 'screen' contact (no TV, etc).