假设你的学校正在征集“校园活动设计方案”，请设计一个理想中的校园活动，用英语简单说明这个活动的名称、内容和理由，说不定你的创意会变成真实的校园活动哦！

My Ideal School Activity
Our activity is called "Happy Book Sharing Day".
On that day, every student takes 2 or 3 favourite old books to school. We can swap our books with other classmates, so we can get different books to read. We can also sit together and talk about the interesting stories in our books.
I love this activity, because it helps us read more good books, and we can also make more new friends here.

这是一道开放性的英语写作题，要求我们设计一个校园活动，作答时需要包含三个必备部分：活动名称、活动内容、设计该活动的理由，使用四年级已学的简单词汇和短句表达即可，不需要使用复杂的长难句。