hi piyu,
I TOTALLY understand you are going through. My son is 2.5 years old and he is very very active and I already have a vert difficult time keeping him busy with activities because he can become distructive to the point where he throughs out all this things in his room to a big 3 foot pile of toys books, etc. I then have to spend 2 hours cleaning it because he won't do it.
I also wonder how parents have so many kids and manage to keep a level head. There are times when I just want to go hide under a blanket when my son get hyper active.
I want to have another one soon only because I feel if my son had someone to play with he would keep busy playing together rather than always sticking to me. But I have to agree with you that its tough and hard to imagine how people do it with so many kids. Maybe they use ear plugs!