What is this?
It is a pig.
What is this?
It is a tin.
Let spell the word. (size)
b - i - g
Let spell the word.
w - i - g
What size of a pig?
It is a big pig.
What is this?
It is a pin.
Let spell the word.
p - i - g
What is this?
It is a bin.
What is this?
It is a wig.
Let spell the word.
d - i - g