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 ...
