Since I was a child, I counted things in base 16. But remember that I was an average intelligent person and never made someone shout:
Oh, frabjous day! This kid just told me that he has 0x64 Lego bricks!
Someone
I always kept in mind 16 dots arranged in a square of 4x4. These dots were connected by a line every time I counted something, or someone said something.
This is the scheme (row-column matrix):
[0,1]-[1,1]-[1,0]-[0,0]
[3,2]-[2,2]-[2,3]-[3,3]
[0,2]-[1,2]-[1,3]-[0,3]
[3,1]-[2,1]-[2,0]-[3,0]
Usually, I ended my phrases when the square was filled up. With hindsight, I was a bizarre kid.