All the flavors! I picked up Black Current because that's not something you see in the US.
In the UK, their Jell-O brand corollary is called Hartley's Jelly and it's sold in small bricks of firm gelatin. A little strange when you're used to powder packets but also fun to dissolve in boiling water.
I've been told by people who would know that as kids, sneaking bites of the condensed jelly was a treat. Probably something I would have done. Or would perhaps still do. For the blog, of course.