Finger Adornment; Changes Hue to Match Emotions
Puzzle 5 of Day at the Museum Easy Pack
Question is: Finger Adornment; Changes Hue to Match Emotions
and the answer is: MOODRING
Word Meaning:
MOOD RING — A ring (piece of jewellery) containing a thermochromic element that changes colour in response to the body temperature, supposed to indicate the emotional state of its wearer.
Definitions from Wiktionary.