Also your ideas of children are way off. We have a seven month old and we read to her, take her to the library, go to space talks, etc. Actually we do a lot more intellectual stuff now. My wife has taken some online courses ans weve started re learning french. Parents who put their kids in front of the TV are lazy.
Parks exist in most urban areas and are perfect for kids to play in.
All the other dangers you mentioned are way overstated
I do not understand this paranoia that has gripped the American public. The way people act would have you believe things are worse today than in the past when all actual data (anf observation) say the contrary