A boy named Max had magic glasses. He could see how words affected people. His friend, Lisa often used unkind words. Max wanted to help her realize the power of her words. One day, Max showed Lisa his magic glasses. 'Look at Mr. Brown,' Max said. Lisa saw Mr. Brown saddened by her unkind words. She had called his garden 'untidy.' Max explained, 'Adding 'un' before 'tidy' changes its meaning.' Lisa was surprised. She then saw a girl she had called 'disrespectful.' Max clarified, 'The prefix 'dis' changes 'respectful' to mean its opposite.' Then they came across a poster for a 'pre-sale.' Lisa was confused, but Max elucidated, 'Adding 'pre' to 'sale' denotes a sale that is happening before the actual event.' Lastly, they saw Lisa's brother, whom she had called 'unhappy.' 'What if you try to 're'happy him?,' Max suggested. Lisa laughed, 'That's not a real word, Max! I get it, 're' means to do again, but we can't apply it to every word!' From that day, Lisa used kind words and understood the power of prefixes.