While Phillip is portrayed as a young boy who is more interested in playing games and learning about the world, the book doesn't really go into great detail about his clothing or possessions.
Here's what we *do* know about what Phillip carries with him:
* His diary: He keeps a diary to record his thoughts and experiences.
* A small knife: This is mentioned as something he finds useful in his survival on the island.
* A few personal items: These items are not specified in the book, but it's likely he has some belongings that he's brought along with him.
It's important to note that the focus of the story is on Phillip's emotional and intellectual journey as he copes with his new reality on the island and learns to rely on Timothy for guidance and support. His clothing and possessions are less important than his internal struggles and growth.