根据Bob和家人的暑假旅行计划，以“Bob's plan for summer holiday”为题写一篇短文，介绍Bob一家人的暑假之旅。至少5个句子。

Who: Bob and his parents

Where to go: Hainan

Go there by: plane

How long: 7 days

Weather: hot

Clothes: T-shirt, cap, umbrella, shorts, shoes ...

Activities: go swimming and eat seafood ...