The obligatory post-comic-con, uh, post is forthcoming, but I'm a little buried in various ... things ... at the moment.
So, please enjoy this semi-relevant commercial from 1979:
I totally had one of those when I was 7, and my prize was a sheet of iron-ons. I remember being so excited when my mom put Mr. Spock and the science logo onto one of my T-shirts.
(commercial via David Markland on Twitter)