In certain types of warfare, for example, insurgency as practiced in Southeast Asia, enemy infiltrators and insurgents resort to extensive tunnel networks to hide from the established forces. The tunnel system in any one area may be elaborate and may traverse several levels and numerous branches with the arrangement being such that the insurgent forces are disposed in the system in such a position that a high explosive detonated at the tunnel entrance will have little effect on those hiding in the tunnels because of their labyrinthine construction whereby the direct force of an explosion is screened from the occupants. Because of the danger of booby traps or ambush it is not practical for attacking forces to enter the tunnels with the result that heretofore there has simply been no way to kill or dislodge insurgents hiding in the tunnels and the broad object of the present invention is to provide means for exploring tunnel networks by a self-propelled device which can be safely controlled from a remote position outside of the tunnel network.

More particularly, it is an object of the invention to provide a tunnel exploring device which may be maneuvered from a remote position deep into the tunnel network and there be detonated so that there is a much higher kill probability of the enemy forces with greater safety to the attackers than has been possible by any means employed heretofore.

It is like a mother's real breast. A baby grabs hold of the facsimile, its nipple in its mouth, its cheek against a simulated heart that beats 70 times regularly every 60 seconds.

The tot apparently feels secure and reassured, stops yelling and drifts off to sleep without another whimper.

Bed-wetting is also greatly reduced, inventor Majima finds.

"Mother Heart" now sells abroad, not just on Japan's domestic market alone. Ready-made markets, Majima says, have been found in the Mediterranean countries, like France, Italy, and Spain, where mothers are especially close to their infants, and vice versa.