Dear Ann,
Thanks for your letter. You ask me what I am going to do on this weekend.
Well, on Saturday we are going to visit our Granny who lives in the country.
There is a river not far from her house and I am going to swim and dive there
with my sister. After dinner we are going for a walk in the forest to look for berries and mushrooms. In the evening we will return home and I'll play computer games. On Sunday my friend Sasha has a birthday party. My friends and I are going to visit Sasha. We are going to give her our birthday presents. We will dance, sing songs, listen to music. We'll have fun! And we'll have tea with a cake of course. In the evening I'll go for a walk with my friends. That's all for now. Keep in touch.
Best wishes,
Lena
(Вместо Lena - ваше имя без точки на конце)