blue text is correct and green text are my comments or explanations

Last Weekend

Hi! I'm writing about my last weekend and the things that I did. Saturday morning, I got up and had  a  breakfast.

Later, I tidied up my bedroom, the dining room and living room and my parents's parents' bedroom [see http://www.grammarmudge.cityslide.com/articles/article/1026513/8914.htm.

My aunt called my father by telephone.

We will go to Vera for a stay there that weekend [which weekend? If you use "that" you must explain which weekend refers to "that"] with they them ( my aunt, my uncle and my cousins). [see   http://esl.about.com/cs/beginner/f/f_pronouns.htm ]

[Similar to using "that", you must name the people before you use the pronoun "them",  for example: ..... with my aunt, my uncle and my cousins.  We will stay with them for one week]

 We ( My family and I ) prepared suitcases with few things like clothes, bikini, flip-flops, Ipod, chewing gums and a pen drive. We arrived in the evening.

We went to apartment for let go suitcase.  We went to an apartment to drop off our suitcases / the suitcases.

 Then, we went to a supermarket to buy food and drink.

Afterwards, we went out for have some drink and some eat. Afterwards, we went out to have something to eat and drink.

 We strolled for a maritime walk and went into the water in the beach. We strolled along the beach and went into the water.

 The next day, we passed morning in other beach that we went last day. The next day, we passed the morning at the beach that we had gone to the day before. The next day we passed the morning at the beach where we had been the previous day [previous day = the day before = yesterday]

About After thirteen hours [or: Thirteen hours later...] we came back to my aunt's house.

We were swimming there ( she have has a swimming pool in at her house). [I'm sure the swimming pool is outside (outdoors) and it is not inside the house:), but if you say "in" the house it means "inside" ..... Only rich, rich people have a pool inside the house]

We ate rice. We went to a spa for the afternoon and in the evening we came back at to my house.

Good weekend... good story ... well-written