Possible Clues:

• Spring toy
• Love up in heaven is sexy
• Toy used on flights
• Form-fitting
• One-step-at-a-time toy
• "For fun it's a wonderful toy" item
• Classic toy
• Sexy stuff of writers written in secret
• Coiled stair-walker
• Toy that 'Log' was a parody of, on 'Ren & Stimpy'