This little guy spends a lot of
time hiding, out of sight, because he’s
very shy. You won’t see him very
often but he’s always watching and
checking what goes into the poo
processor and what comes out. He
marks every poo between 1 and 7,
depending on what it looks like.
This is called the Bristol Scale.
Bristol runs up and down the Tunnel with
suggestions of how to make a perfect
poo. The best poo is marked
between 3 and 4.