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'So how long is it?'
'It's 183cm, hold the tape still, mummy.'
'And how high is it?'
'It's 74cm. Mummy, please hold the tape still. Miss said you need to hold tapes still for an accurate measurement.'
'Is this okay?'
'You're not holding it straight, mummy, and that affects the measurement. Miss said you have to hold tapes straight to get an accurate measurement.'
'How about that?'
'Thank you, mummy. Please measure 91.5cm to the centre and 15cm out from that point on each side.'
I sighed and carried on with the most accurately constructed cardboard box den ever.