This is a classic nursery rhyme following the story of a young girl named Mary. It is presumed to have taken place in the past, as that is when it was written. It has been passed on as a fun song with no particular message for over 400 years.
Mary had a little lamb
Little lamb, little lamb
Mary had a little lamb
Who's fleece was white as snow
And everywhere that Mary went
Mary went, Mary went
Everywhere that Mary went the lamb was sure to go
It followed her to school one day
School one day, school one day
It followed her to school one day
Which was against the rules
It made the children laugh and play
Laugh and play, laugh and play
It made the children laugh and play
To see the lamb at school