Happiness and Birds

4-year old brother and I having a somewhat silly conversation 10 minutes ago about how he wears the knees out of his pants.

Me: '..And you're silly too, look how can you do that to your jeans?'
Lil Brother: 'No Mary! I'm not silly!'
Me: 'Ok, sorry, I was being silly then'
Lil Brother: 'I'm not silly, I'm good'
Lil Brother: 'And you're not silly, you're good, and happy..'
Me: *smiles*
Lil Brother: '...Good and happy - like a bird'

WHAT?? I miss the connection between happiness and birds!

My Mum just enlightened me - He had just seen a bird fly past the window, and had to use it in his conversation with me :D