《ABC》是一首非常簡單、易於上口的歌曲，適合自由發揮歌詞。以下是一些可能的歌詞自由發揮的示例：
1. "A is for apple, that's what I love to eat,
B is for banana, that's what I enjoy to see,
C is for cookie, that's what I'll have with tea."
2. "A is for adventure, that's what I'm looking for,
B is for beautiful, the world is full of color,
C is for confidence, that's what I'm building now."
3. "A is for animals, I love to pet them all,
B is for beautiful flowers, I enjoy looking at them,
C is for confidence, I'm building it every day."
4. "A is for adventure, it's what I dream of,
B is for beautiful memories, they fill my heart,
C is for confidence, it's what I'm feeling now."
你可以根據自己的想法和感受，自由地添加、刪除或改變歌詞，以使歌詞符合你的個性和風格。重要的是要保持歌曲的簡單和易於上口，以便孩子們能夠輕鬆地學習和記憶。