A poem for several children to take part in

This is a "rap" poem - a performance poem and local children I know say it's "cool" - which I guess is teen-talk for OK.  I can imagine them with sheets over their heads, and chains to rattle etc - and even the audience can click their fingers and sway and join in with the whooooohooo's between verses.  This poem was never meant to stay on the pages of a book.  I would aim this poem at children from 7 or 8 upwards.  It may be a bit scary for very young children.  I've tried to vary the words for "ghost" and brought in lots of assorted adjectives to help with vocabulary extension.  Teachers should get a lot from this for their English lesson, and it's a poem children can use to copy the style in a poem of their own on a subject dear to their hearts.
Are you ready to click your fingers?  One, two - one two three four - - -

Sound recording of this poem (including rattling of chains, ha ha) - http://www.whiteheadm.co.uk/html/spooky.html#spooky   Well worth listening to for a laugh.