It is impossible to be more Zen than a child

A couple of minutes ago I was walking on the street when I heard a mother explaining to her 5-6 years old child why trees are leafless in the winter.
In an outburst that mother told the kid that the trees in winter, without leaves, are uglier.
The child stared at her and told her something like this:
"But without leaves we can see the sky much better."
I could not help smiling and thinking:
It is impossible to be more Zen than a child.