How old was the creator of this website?

The creator of the website was 8 years old. Yes, really.
He created this website with some help.

Are all of the Google eggs shown real?

Yes, these are all verified Google easter eggs.
If they were not real, this website would not exist.

Are these all the easter eggs?

No, these are not ALL of the Google easter eggs.
They will frequently grow as discovered.

Who creates these easter eggs?

The Google Team does. These are not made by this creator of the website.

What are Google Easter Eggs?

Google Easter Eggs are little fun pop-ups that you see if you search something specific.