Possible Clues:

• Type of block that's an easy thing to make ?
• Given piece of cake, is this enough to blow out candles?
• Doddle - light wind
• It's so easy to find brick-making material
• Snap
• Light wind or small cinders
• A blow from this will reduce it to ashes
• It's rather a blow to make blocks of it
• French cheeses, so people say, produce slight wind
• Soft air