Not allowing them to run around outside... and when I was in gradeschool playing outside we all knew which house was the crackhouse, so I don't care too much for excuses like "we live in an Unsafe Area" Feeding your kid too much junk and letting them drink too much juice... and when I was a kid money was tight. I ate junk, but when a meal consists of four chicken nuggets and no side or dessert, it's kind of hard to get fat off of that. Butt I HAVE ZERO IDEA WHY KIDS ARE THE SAME WEIGHT AS FULLY GROWN ADULTS!!!!