Kids now a days are developing more, they don't need to spend much of their time on the out door activities rather they are very addicted on the fast changing technology. Why play tag, when you can do it on computer and play the Defense of the Ancient (DOTA), or do children need to go the school library and research there when all they need is to turn on the wi-fi and check it on their very accessible i Pads and the likes. Of course it will save too much time and effort, but their bodies are not that active enough.
Even when you want to play a sport like bowling, you don't have to go to the Bowling center just to play, you can now play at home using XBOX, and play bowling all day long. Our bodies and minds need to exercise to keep it strong and healthy, accompanied with a correct food diet and for sure our kids will get that nutrients they needed for the day.