A few honest serving-men

I keep six honest serving-men
(They taught me all I knew);
Their names are What and Why and When
And How and Where and Who.
I send them over land and sea,
I send them east and west;
But after they have worked or me,
I give them all a rest.

I let them rest from nine till five,
For I am busy then,
As well as breakfast, lunch, and tea,
For they are hungry men:
But different folk have different views;
I know a person small –
She keeps ten million serving-men,
Who get no rest at all!
She sends them abroad on her own affairs,
From the second she opens her eyes –
One million Hows, two million Wheres,
And seven million Whys!

Rudyard Kipling - Just so stories

(This book is a work of genius. I thing the name of writer speaks by itself. A pure and well-done job. A learn-book of stories (not just) for children)