What is a jujube? I've always heard it pronounced "Joo-Joo-Bees," but the spelling looks to me it should read "Joo-Joobs." Regardless, these hard little translucent cylinders are a bizarre suspension of sugar, starch and mineral oil-- hence the "fat free" logo. They look a little bit like LEDs, or the lenses that go over them. If you wanted to build the edible equivalent of an LED matrix, these are your best bet.
Part of the circuitry snacks project: Edible models of functioning electronic circuits. Designed for fun, for geeks, for kids, and for teaching and learning electronics.