THEY WERE CREATED AS WEAPONS OF MASS DESTRUCTION. THE SPONGE KNOWS WHERE IT IS BY KNOWING WHERE IT ISN'T, AND IT USUALLY ALWAYS MANAGES TO FIND ITS TARGET. SADLY, THE DEVICE IS TOO HEAVY TO MOVE. Model I Made Out Of Complete Boredom One Day This Model Has No Rig S.T.G.M Comes From Terrors Of Nowhere Created By Beyond If you use this Model, Please Credit Me. :)