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Thank you. Not sure I know what he means about bubbles but if I do want to make bubbles I would carve them in the back of the block of ice as a negative shape and when viewed from the front they would appear to be floating inside. Your kids are always asking interesting questions.

I don't know either, but on looking again I think he might mean the neck scales which he may not have realised are not inside the ice block (unless they are in which case that might be what the question was about).

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