There were seminars (about being a cheapskate collector, posters, food, humorous items etc.) at the end of each session they passed out free trading cards.
Here's the list of cards:
1 Checklist
2 Power of the force coins
3 Cereal boxes
4 Posters
5 Lunch boxes
6 food items
7 apparel
8 unproduced toys
9 unproduced toys
10 fast food displays
11 store displays
12 action figures
13 international toyss
14 international toys
15 movie props
16 patches & buttons
17 trading cards
18 international toys
19 humorous toys
20 film memorabilia
21 cast & crew