He drinks milk. He eats a healthy amount. And he sleeps just fine. PDs tell me that kids at his age tend to be very active and weight gain is usually slow (1-1.5kg in one year is normal). You may find it hard to believe, but i was a slim kid too until i was force-fed by my maid when i was 7 because people thought i was "too skinny". Anyhows that's another story altogether.
Make no mistake, I am concerned about his weight gain too. Every parent will want their kids to be a wee bit fatter, a lot taller, healthier etc etc. There is nothing i would not try to make him grow.
So i'm embarking on a new project. Fatten Mountain Boy. I want to feed him all the fattening stuff and see if he can put on more weight. Don't say i didn't try...
First up.
Very fattening 2-cheese pizza with whole-wheat flour base. Made everything from scratch, even the damn dough.
Verdict:
He wolfed down 4 slices of a 10-inch pan at one go for his afternoon snack!

Now where's that weighing scale!