i was leela for halloween in 2008!
for the eye i bought a white styrofoam ball from the craft store- sliced off a side of it to the right size.... covered it in white felt- and put a dot of black felt as the pupil.
i took nude pantyhose- and sticky sided velcro- and velcro'd the "eye" to the pantyhose. then tied the panty hose around my forehead.
i pushed the eye up a little bit so i could see better- but this was the only option i could think of for the eye.
the gun i just bought a water gun from the dollar store. i also bought some cheap belts and wrapped them around my black boots for a chunkier feel.
i wore black leggings, white tank top, wig with bangs- and sprayed it purple with a high ponytail.
i also wore a black belt and looped the trigger of my gun through it