以下是一個簡單的小學生英文故事書：
故事名：《小貓咪的生日派對》
故事內容：
小貓咪過生日了，它非常高興。它請了許多好朋友來參加派對，有小白兔、小狗狗、小猴子等等。小貓咪準備了好多好吃的和好玩的，還有它最喜歡的生日蛋糕。在派對上，大家一起玩耍、吃東西、唱歌跳舞，玩得非常開心。小貓咪感謝所有的好朋友，也感謝媽媽為它準備了這麼棒的派對。
英文版：
Today is Little Cat’s birthday! He is so happy. He invites many good friends to his party, like Little Rabbit, Little Dog, and Little Monkey. Little Cat prepared a lot of delicious food and fun toys, and his favorite birthday cake. At the party, everyone played, ate, sang and danced, and had a great time. Little Cat thanks all his good friends and his mom for preparing such a great party.
希望這個故事書能夠幫助你更好地了解如何用英文表達一個簡單的故事。如果你還有其他的問題，歡迎你繼續向我提問。