Hello dear Robert(типа друг)
Last Sunday was my birthday, thanks for you congratulations. Im so upset when you did not come because your sister ill, but I can tell you all about it!
There are was 20 friends that come for birthday all of them you now, from school, kinder garden and my parents.
All birthday was in my house and Im very grateful my parents because they helped me did it all!
There are a lot's if presents but the most interesting was 64 sided Rubik's Cube, new video game, and box with cookies predictions. Other presents was money. I very happy of my birthday and I'm very glad to see you in next birthday!
Your (твое имя)