By the way, the cockroach is a funny animal, if you catch a few, hang for the wings with a small thread to the main long thread, cut circles from dense paper, paint these circles with multi-colored pins and give to the foot of the cockroaches - get a fun girland, batteries in the cockroach to spin the circles will be enough for a long time! (Well, as submarines do not go crazy for 70-80 days underwater - cockroaches, rats and cities are fun).