[melidasaur]

I'm not a parent, but this is my thought. Make sure that you aren't doing anything to make your children feel ashamed about eating. Sometimes, when kids feel ashamed about eating or their body image, they will resort to hiding food and eating it in private where they don't feel scrutinized. Body image issues can start as early as 7 - or so I've heard - so your oldest one may be dealing with feelings of this. The 4 year old - maybe mimicing the older siblings behavior.

I guess what I'm trying to say is - make sure your kids know that it's okay to eat - and they are growing and it's perfectly okay for them to eat and they can eat out in the open. Maybe do something fun in the kitchen or family room and make a snacking area - like some fun bowls and plates, placemats, etc - make it a party whenever you and your family share in a special treat. Your kids will associate snacktime with family and fun and hopefully they will keep the food out of their rooms.

When I was studying for the bar exam a few weeks ago, I did eat in my room, but because I couldn't get any peace and quiet anywhere else whilst studying and eating.