I have a mood ring glued to my middle finger every single day. I've loved it since the day I bought it in Australia over a year ago from the most awful souvenir store in the world. What's nearly as great as a mood ring? Mood nail polish!
'IN THE MOOD' [nail polish brand] have created a mood-changing nail polish that fades from one colour to another. Seriously, this nail polish rules. What's even better is that it doesn't fade to an ugly brown colour - the hues are tonal and look absolutely delicious.