Not a secret, the specifics are up to the instructor what they add, what language you're doing the seminar in. You'll receive quite a few handouts and produce a few worksheet to take home so most instructors will include something to store it in.

You'll receive what you need to do the course. What we need you to have, to successfully complete the seminar. We don't have to rely on half the students not having what they need in order to participate in the seminar.

Not everything is handed to the students at the very beginning of the seminar by most instructors. The kit may include more or less of the stuff that will be handed as the days progress. Since students take the kits home first night and promptly forget to bring it back for the following days. Most of it won't be in the kid the first night.

Alex