Possible Clues:

• For the young to get wise, by the sound of it
• Yoyos, for example
• Elves' creations
• North Pole 'exports'
• Aerosmith placed them in the attic
• Transformers and Barbies
• 12/24 deliveries
• They may instruct in nursery schools
• Children's Christmas wish
• Kringle's burden