Eighteen 25 has a really easy way to create some spooky ghosts for halloween using just empty gallon milk containers, black marker and white lights.
Good for ages 7 and up.
Get the instructions here:
http://eighteen25.blogspot.com/2010/09/todays-project-spirit-jugs.html
Condo blues uses solar lights.
Get the insturctions here:
http://www.condoblues.com/2011/10/make-solar-milk-jug-ghosts.html
She knows adds crepe paper streamers.
Get the instructions here:
http://www.sheknows.com/holidays-and-seasons/articles/842185/how-to-make-an-easy-light-up-ghost-out-of-a-milk-jug
Making memories with your kids adds colored holiday lights.
Get the instructions here:
http://makingmemorieswithyourkids.com/2010/10/line-up-of-ghosts/