The pin is a part of 'Trick or Treat ' series of 2004. The pin displays a scene of Halloween night. There is big yellow full moon in the background. A black shadow of a tree is also visible. The pin also features a Mickey icon at the centre.   Parts of the pin glow in the dark.   At the top of this pin it reads  "Happy Halloween 2004" in silver on a yellow background, whilst the  bottom of this pin shows text "Walt Disney World " in silver on a background of brown.
On this pin you will find Dale from Mickey Mouse.   He is seems to be sitting in a candy filled Jack-o-Lantern. He is trying to catch the candy attached by a spring.  

At the centre of the pin there is an orange pumpkin.

The rear of the pin is silver with speckles.  "Official Pin Trading 2004 Trick or Treat Collection ©Disney Made in China Limited edition 1500" is written on the back of the pin.  There is a Disney Pin Trading Logo on the rear of the pin.  There is one post and one nub on the back of this pin.  The back of this pin has two rivets.