What do romance novels have in common with candy experiments? They're both full of sinking and rising hearts.
Cake Mate hearts float nicely for a few minutes when you put them in water. As they do, they dissolve, shedding bright red sugar solution. The solution, denser than pure water, sinks.
Conversation hearts sink immediately. In some hearts, however, trapped air bubbles seem to emerge, floating upwards, sometimes carrying up candy particles. (Watch the blue heart in the right side of the bowl shedding pieces which float up to the surface.)
I can feel my heart rising already, can't you?