While I was studying in Cambridge, I was invited to my mentor Horace Barlow's Xmas party once. It was a small and cozy party, with Horace's family and lab members.
Horace at that time was already of a venerable age, and yet it was fun to watch how he enjoyed opening the Christmas cracker, just like a child.
Out of all the contents of the Christmas cracker, the paper hat was the main thing. People wore them without exception, including Horace.
I have a vivid recollection of how Horace was smiling, with the paper hat on his head, looking like a five year old trying to pretend to be a king. To this day I cherish the memory of the wonderful sunshine emanating from Horace's countenance.
A Christmas crackers is a great inducer of the child in one. A child inducer is always a good thing.