@tanguatlay,
Okay, mom, here's my editing advice followed by my own version. There are only a few problems with grammar and word choice. The predominant problem with the writing is redundancy. What does that mean?
Here's the Webster's Dictionary definition of Redundant:
Exceeding what is necessary or normal; characterized by or containing excess; using more words than necessary; characterized by similarity or repetition.
Your son's original essay (see my note references for explanations pertaining to what he has written.)
(See note 4) One fine sunny Sunday afternoon, Mr. and Mrs. Lee took their sons, Jacky and Dawn,
(See note 5) to a picturesque seaside
(See Note 3) to have a picnic. As the seaside was far away from their home, Mr. Lee drove them there.
When they arrived at their destination,
(see note 3) Jacky and Dawn were too impatient to wait,
(see note 3) so they took their swimsuits and rushed into the changing room to change. After that, they hopped into the sea.
(See note 3) In the meantime, their parents laid the mat with fried rice, two bottles of Sprite, a chocolate cake, and some sandwiches. Mr. Lee then tuned the radio to class 21 for his wife. Meanwhile, Mrs. Lee went to buy a copy of newspaper for her husband. While Mr. Lee read the newspaper, his wife listened to the radio.
(See Note 3)
After about twenty minutes, the two boys were hungry and went back to the beach to have some food. They ate the delicious fried rice before eating the sweet chocolate cake and sandwiches which
(See note #1) were prepared
(See note #2) by Mrs. Lee. Jack liked the taste of the cake and sandwiches and asked his mother, “How delicious! How did you do it?” Mrs. Lee answered, “I used some baking powder and some fragrant ingredients. Mr. Lee also joined in praising Mrs. Lee for giving them such palatable food.
(See note 3)
After their meal, it was half past six and Mr. Lee suggested going home. They packed up and were soon on their way home. Mrs. Lee promised to take them to the beach again. The children were happy on hearing that. They are now looking forward to the next trip.
(See note 3)
Notes:
1. "That" or "Which"
If these words are not essential to the meaning of your sentence, use "which" and separate the words with a comma.
• Instead of: I have a great book which you can borrow for your vacation.
• Consider: I have a great book, which you can borrow for your vacation.
• Or consider: I have a great book that you can borrow for your vacation.
• Instead of: We want to buy the photo which Harry took.
• Consider: We want to buy the photo, which Harry took.
• Or consider: We want to buy the photo that Harry took.
2. Passive Voice
For a livelier and more persuasive sentence, consider rewriting your sentence using an active verb (the subject performs the action, as in "The ball hit Catherine") rather than a passive verb (the subject receives the action, as in "Catherine was hit by the ball"). If you rewrite with an active verb, consider what the appropriate subject is - "they," "we," or a more specific noun or pronoun.
• Instead of: Juanita was delighted by Michelle.
• Consider: Michelle delighted Juanita.
• Instead of: Eric was given more work.
• Consider: The boss gave Eric more work.
3. Thesaurus, Redundancy, and Phrasing
Word replacement suggestions:
Replace seaside with either seashore, or beach or coast. They are similar in meaning and more commonly used.
"When they arrived at their destination" is redundant. Replace with "When they arrived,"
"Were too impatient to wait" is redundant. Replace with "Were too impatient,"
"so they took their swimsuits and rushed into the changing room to change. After that, they hopped into the sea." This is full of redundancy. Replace with "so they rushed to the changing room with their swimsuits before dashing to the sea."
"In the meantime, their parents laid the mat with fried rice, two bottles of Sprite, a chocolate cake, and some sandwiches. Mr. Lee then tuned the radio to class 21 for his wife. Meanwhile, Mrs. Lee went to buy a copy of newspaper for her husband. While Mr. Lee read the newspaper, his wife listened to the radio."
Too wordy and detailed. It can be simplified with the reference to the details in the next paragraph.
Rewritten:
Their parents unpacked the picnic food and laid it on the mat. Mr. Lee tuned the radio to his wife's favorite class 21 when she returned from buying a newspaper for him. Together, they enjoyed their pastimes.
" After about twenty minutes, the two boys were hungry and went back to the beach to have some food. They ate the delicious fried rice before eating the sweet chocolate cake and sandwiches which were prepared by Mrs. Lee. Jack liked the taste of the cake and sandwiches and asked his mother, “How delicious! How did you do it?” Mrs. Lee answered, “I used some baking powder and some fragrant ingredients. Mr. Lee also joined in praising Mrs. Lee for giving them such palatable food."
Awkward and redundant. It is not necessary to always refer to them as Mr. or Mrs. Lee. It is more common in informal writing to use the word "parent" or "mother" or "father"
Rewritten:
Twenty minutes later, the boys were back to fill themselves with the fried rice, sandwiches and chocolate cake prepared by Mrs Lee. The chocolate cake was a favorite of Jack's. “How delicious! How did you make it” asked Jack. “I used some baking powder and some fragrant ingredients," replied his mother. Mr. Lee joined in with a chorus of praise for the food.
" After their meal, it was half past six and Mr. Lee suggested going home. They packed up and were soon on their way home. Mrs. Lee promised to take them to the beach again. The children were happy on hearing that. They are now looking forward to the next trip. "
Too linear and choppy. Make use of compound sentences by adding conjunctions such as the word "and".
Rewritten:
Checking the time, Mr. Lee suggested they pack up and head for home. Hearing their mother's promise of a return trip to the beach made the boys happy and looking forward to the next trip.
4. Always use a period after the Mr. and Mrs. Abbreviations.
5. Your son is using the feminine spelling of the names Jacky and Dawn for the two boys. Change it to Jack and Don.
Here is my version of your son's essay. The differences are mostly of style and common usage.
Quote:One fine sunny Sunday afternoon, Mr. and Mrs. Lee took their sons, Jack and Don, to the picturesque seashore to have a picnic. As the coast was far away from their home, Mr. Lee drove them there.
When they arrived, Jack and Don impatiently rushed to the changing room with their swimsuits before dashing to the water.
Their parents unpacked the picnic food and laid it on the mat. Mr. Lee tuned the radio to his wife's favorite class 21 when she returned from buying a newspaper for him. Together, they enjoyed their pastimes.
Twenty minutes later, the boys returned to feast on the fried rice, sandwiches and chocolate cake prepared by Mrs. Lee. The chocolate cake was a favorite of Jack's. “How delicious, tell how it was made!” exclaimed Jack. “I used some baking powder and some fragrant ingredients," replied his mother. Mr. Lee joined in with a chorus of praise for the food.
Checking the time, Mr. Lee suggested they pack up and head for home. Hearing their mother's promise of a return trip to the beach made the boys very happy and looking forward to the next trip.
By the way, mom, you sell yourself short when you disparage your own writing skills in English. You express yourself very well and should have more confidence in your ability to teach your skill to your son.
I hope that my effort here helps.