A survey of the ongoing chemistry experiment known as the novelty candy industry...
Juicy Drop (from Bazooka Candy Brands) makes candy products incorporated with additional super sour candy goo to squeeze upon the chosen candy. Thus you find the Chew Taffy with Sour Gel Pen in Knock-Out Punch flavor. Or the lollipop with squeezable sour gel in Blue Thunder flavor (I never knew this is what Blue Thunder tastes like...). None of it is tasty but the whole process of squeezing sour goo onto a candy base is pretty fun. It's more of an activity than a snack.
Score (taste): 2
Score (fun): 3