Everything must be in moderation, I was a MAJOR book reader- my parents used to tell me I had to finish my homework before I could read any books. And mi keamcha yisroel, I wouldnt say that books are always educational- not quite. Maybe vocabulary wise- but a good book can make you think about it for a while. When I was into the Harry Potter’s – thats all I could think about for a day or two after I read them.
I think electronics are fine, good sometimes even but it must be in moderation.