Dear granny!
How are you? I am on holidays with my friends and parents now and I really enjoy it! We live not far from sea, so we can go to swim every time we want. It is really beautiful here, I promise that I will send you some photos later.
Today we want to go to the park, which is not far from our hotel but they say it's very nice, so we are going to have a picnic.
Write back soon.
Your (твое имя)