I found this fascinating quote today:
With summer essentially here in most parts of the country, it’s a great time to be outside. There are more hours of daylight, kids are out of school (or soon will be) and nature is in full swing. To encourage dads to spend more time outside with their kids, the National Wildlife Federation is offering the Be Out There™ pledge. Kids these days tend to spend much more time in front of electronic devices than playing outside. This isn’t good for their health, imagination, concentration or, in some cases, aggression levels.wired.com, Grab Your Kids and Be Out There™, Enjoying Nature, Jun 2010
You should read the whole article.