Related Clues:

• Current crazes
• Mood rings, pet rocks, etc.
• Pet rocks, hula hoops, etc.
• Transitory trends
• Sudoku and others
• The twist, once, and others
• Short-lived fashions
• Whims
• They come and go
• Brief crazes
• They don't stay hot for very long
• Fleeting fashions
• Beanie Babies, pet rocks, etc.
• They don't last long
• They're ''in'' briefly