From "The Bad Child's Book of Beasts"

The Lion, the Lion, he dwells in the Waste,
    He has a big head and a very small waist; 
But his shoulders are stark, and his jaws they are grim,
    And a good little child will not play with him. 

The tiger, on the other hand,
    Is kittenish and mild, 
And makes a pretty playfellow
    For any little child. 
And mothers of large families
    (Who claim to common sense) 
Will find a tiger well repays
    The trouble and expense. 

Be kind and tender to the Frog,
    And do not call him names, 
As "Slimy skin," or "Polly-wog,"
    Or likewise "Ugly James," 
Or "Gap-a-grin," or "Toad-gone-wrong,"
    Or "Bill Bandy-knees": 
The Frog is justly sensitive
    To epithets like these.

No animal will more repay
    A treatment kind and fair; 
At least so lonely people say
    Who keep a frog (and, by the way, 
They are extremely rare).

The Microbe is so very small
You cannot make him out at all,
But many sanguine people hope
To see him through a microscope.
His jointed tongue that lies beneath
A hundred curious rows of teeth;
His seven tufted tails with lots
Of lovely pink and purple spots,
On each of which a pattern stands,
Composed of forty separate bands;
His eyebrows of a tender green;
All these have never yet been seen--
But Scientists, who ought to know,
Assure us that they must be so....
Oh! let us never, never doubt
What nobody is sure about!