here’s a little thing i made whilst i was messing around.
my idea was to create a ‘cotton reel’ that is on a spring so that you can pull string from it, and when you loosen your string, it rolls back up.
take a look
[swf=http://www.kirupa.com/forum/attachment.php?attachmentid=13863]height=700 width=700[/swf]
[edit]updated it so it’s smoother when you roll over it - my friend complained :([/edit]