Title: A Fun Day at the Seaside with My Parents

Last summer, I had an unforgettable experience at the seaside with my parents. We decided to go fishing, which was a new and exciting adventure for all of us. We woke up early in the morning, packed our bags with snacks and drinks, and headed to the beach.

As we arrived at the seaside, the sound of the waves crashing against the shore filled the air. The sun was shining brightly, and the sky was a clear blue. We found a perfect spot on the sand to set up our spot. My father built a small tent for us to relax in, while my mother prepared a delicious picnic lunch.

After lunch, we headed to the water. The sea was warm and inviting, and we couldn't wait to dive in. I loved swimming and splashing around with my friends, while my parents enjoyed snorkeling and exploring the colorful coral reefs. We also spotted some sea creatures, like fish and crabs, which made the experience even more exciting.

As the day went on, we played beach games like volleyball and frisbee. We took lots of pictures to remember the fun day we had. When the sun began to set, we sat on the beach, watching the sky turn into a beautiful palette of colors.

That day at the seaside with my parents was truly magical. We created wonderful memories that I will cherish forever. If I have another holiday, I would love to go back to the seaside and enjoy more fun adventures with my family.

建议：

1. 使用简单、清晰的句子结构，适合三年级学生的英语水平。

2. 使用丰富的词汇和表达，使作文更生动有趣。

3. 添加一些细节描述，如海边的风景、活动细节等，使作文更具吸引力。