The Castling Song
Castling is a defensive move
To protect the King, the ruler of the land
the Rook will come over and join the band
There's no worry because the King is safe in the corner
This is the important defensive move in the game of chess!
Our king moves two steps towards the Rook, and the Rook immediately jumps to protect him from the other side. And all this, in just one move!