How is it that they cannot walk,
When slower speed is wanted,
Can play all day and jump and climb,
On into night undaunted. 

Bounding to and fro with mirth,
While chasing wind and rain,
Grubbing, digging, wrestling too,
Impervious to pain.

But task them with some simple thing,
Then comes a sudden crash,
Aching backs and swollen tongues,
With joint-pain and a rash.

Bathroom breaks that take an hour,
Drinks that last all day,
Just anything to slow the pace, 
Because it isn't play.