In the reptile room

In the reptile room,
Where the baby screams,
Weirder creatures loom,
Than in all of your dreams.
In the reptile room,
Hither and thither,
Creatures from cartoons,
Slither any-whither.
In the reptile room,
Anacondas dance,
Will they be our doom,
Will we be their bon-bons
And you wanna know, wanna know, wanna know why I
frown,
Well I'm smiling, I'm just smiling upside down.
In the reptile room,
There's an evil man,
In a strange costume,
Do not ride in his van.
In the reptile room,
Are pythons at play?
In the murky gloom,
What a horrible day...