According to Wikipedia, the Liquid Amber fruit is nick-named: "space bug", "monkey ball", "bommyknocker", "bir ball", "gumball", "conkleberry", "cukoo-bir" or "sticky ball."
Around here, we call them "soot sprites," after the creatures with that name in our favorite children's movie, "My Neighbor, Totoro." When I noticed that Julio had spread them out under the couch, they looked so much like soot sprites, that I had to try adding some stick-on eyes.
If any of you Totoro fans want to make your own soot sprites, you could paint them black and then stick eyes on them. I think they would make the best decorations!