I came back to my house about 7:00 of the evening. So my younger son asked me "Did you check our mail post of the first floor. (Our house is in six floor.)
I didn't understand why he asked me that.
I went downstairs soon. So I found a lovely latter.
He wrote a letter to me in his class. And he put in the mail post after school.
I am really happy.
Thank you taking care of me.