Hello! My name is [Your Name]. I am twelve years old and in Grade Seven at [School Name]. I am very happy to introduce myself here.

I have many hobbies. I love reading books because they help me learn new things every day. I also enjoy playing basketball with my classmates during recess. It makes me feel strong and healthy. Sometimes, I like drawing pictures when I have free time. Colors make my world more colorful!

My favorite subject is English. I think it's interesting and useful. I want to speak English fluently so that I can talk with people from all over the world. To improve my English, I often watch English cartoons and listen to English songs.

At home, I help my parents do some housework like tidying up my room and washing dishes. They say I am a responsible child. I hope to be better and better in the future.

Thank you for listening to my introduction. I look forward to making friends with everyone!

This introduction is simple yet personal, focusing on basic information while adding some fun details about hobbies and family life. Adjust the placeholders ([Your Name], [School Name]) as needed!