Roll out orange taffy candy or fondant into a 2-in.-long rope. Pinch one end into a tail. Round the other end into a head. Roll out yellow taffy candy or fondant to ¼-in. thick. Cut a thin strip, then cut a wave or spiky pattern along edge of strip. Press gently to affix to top of dinosaur body. Ice cupcakes with chocolate icing, then sprinkle with chocolate-cookie crumbs. Top with dinosaur and chocolate rocks.