Conference Passport Alternatives

Hey There,

Looking to get some ideas for alternatives to Sponsorship Passports.

Traditional Passports are given to conference attendee and typically once they visit each sponsorship booth, they collect a stamp. Once their passport is full and complete, they hand it in to go into a draw to win a prize.

Looking for more of a non-traditional approach to this to keep it interesting. For example last year I had delegates collect a lego piece at each sponsor table. They then had to build something from the lego and that was their ballot entry.