What did the Queen place in the Princess's bed to establish her royal ancestry in the fairy tale by Andersen?

I read the princess's version and it was so funny. She didn't sleep a wink cos she was terrified of falling off the 20 mattresses, not because she felt the pea 🤣

Aoife, Oh now that is funny and a much more realistic reason for a sleepless night.

Arohanui, this is the real question 🤔🤔