Jack is a 12-13 year old boy, has short, sharp red hair that stands up to a certain extent. He generally wears either a T-shirt or a magenta sweater, symbols on it. He has blush and freckles, and his eyes are always shown as dots. His mouth is often pursed in a ":7" like way. Jack is a member of the main “science trio”, however, he appears to keep more to himself than Leticia or Derek. He helped out in the geocache, and doesn’t appear to be too resistant to change. He is easily excitable