We had a poem by Mary Howitt not too long ago. Because I am approaching middle age AND have a two year old, I don't remember what it was. Anyway, this was oft quoted by Grandma Malmberg, and I think it makes a nice little salute to Halloween.
Walk Into My Parlor
"Will you walk into my parlor?"
said the spider to the fly;
"Tis the prettiest little parlor that you ever did spy.
The way into my parlor is up a winding stair,
And I have many curious things to show when you are there."
"Oh no, no!" said the little fly,
"to ask me is in vain;
For who goes up your winding stair
can never come down again."