This is kind of an odd question, but I saw this post and wondered...
What's the policy on literally taking home the sand? I know that in the past, people I've known had brought back beach sand from their stays in Hawaii, the Bahamas, etc., but I never thought about it at WDW - are you allowed to take a small baggie or a cup or something home with you? I think we'd like it for scrapbooking and memory boxes, but, obviously, not if it's against policy.