I learnt something interesting about Japanese culture the other day.
The majority of Japanese people have a chunk of their umbilical cord in a jar in their closet.
When a child is born, mothers place a piece of the cord in a special box called a kotobuki bako and keep it safe as a symbol of protecting the child.
Sometimes when the child moves out the mother will give it to them as a symbol of separation.
I think my Mum gave me handkerchiefs, which is infinitely preferable.