Possible Clues:

• Duncan's Throw Monkey and Bumble Bee, for two
• Ninnies
• Toys counting for nothing in day-to-day affairs, ultimately
• Has ups and downs?
• You and yours have reportedly stolenW. King's toys
• Vacillators
• They're wound up before they sleep!
• Up-and-down toys on string
• Goes up and down and ...
• They can sleep while you watch