"Choo Choo!" he says over and over again as he picks the fresh logs out of the log basket and arranges them in a perfectly straight line.
"Choo! Choo!" he says as he manoeuvres them across the room with his stuffed toys aboard.
"Bye Choo Choo", he says bending to kiss the logs tenderly before climbing the stairs to bed.
And I wonder why it is that I ever bother buying him toys.