The Answer:

Here you go. This version comes from a few online sources, and seems to be about right, certainly close enough for a four-year old. Note that in addition to the 1967 cartoon series—which is now available on DVD—this song can be heard at the end of the 2002 Spider-Man movie credits; a fun bonus for those of us who stay in the theater until the end. Enjoy your Halloween!

Spiderman, Spiderman,
Does whatever a spider can.
Spins a web, any size,
Catches thieves just like flies.
Look out! Here comes the Spiderman.

Is he strong? Listen bud—
He's got radioactive blood.
Can he swing from a thread?
Take a look overhead.
Hey there! There goes the Spiderman.

In the chill of the night,
At the scene of the crime,
Like a streak of light,
He arrives just in time!

Spiderman, Spiderman,
Friendly neighborhood Spiderman.
Wealth and fame, he's ignored—
Action is his reward.
To him,
Life is a great big bang-up—
Wherever there's a hang-up,
You'll find the Spiderman!

—The Editors