Thank you all for your helpful suggestion.
I am in a situation like Zaragoza said, that online seating selection won't let us pick the bulkhead seat, which I suspect is the Bassinet seat.
I will, therefore, contact the agent and ask them about the availability of these bulkhead.
My little one is of a smaller scale size, and believes he will probably be able to fit Bassinet.
Only I wish that he doesn't mind staying in there. That, we have to test and see on that day.

>kicking
This was another concern of ours, too.
We'll try to target the bulkhead seats. Wish me luck.

Again, thank you!!!