Vocabulary: The Tooth Fairy

‘Can you replace it this time?’ said Alex. ‘I know you did it last time, but I’m so tired.’ ‘I didn’t do it last time,’ said Kayla. ‘Huh?’ said Alex. ‘You did! Last time, I went and looked under the pillow, but the tooth had already been replaced.’ ‘I’m telling you, I didn’t do it!’ said Kayla. ‘I don’t understand,’ said Alex. ‘If I didn’t do it, and you didn’t do it, then who did?…