20 is provided with a slidable lock means fig2 in the form of a shallow pan shaped slider 68 movable by a switch button 69 in the direction of arrow a for releasably locking the spring motor in its tensioned or wound condition the slider locking is achieved by the free end 70 of the slider which is moved into the space between adjacent vanes 72 to form a stop member in which the vanes and free end at the end of the gear train are not subjected to a large torque the slider also has a slot 74 through which post 46 extens for guiding the slider and rigidifying the free end 70 to prevent lateral movement thereof the spring motor 20 is released for driving the gear train by moving switch button 69 and slider 68 in the direction of arrow b thereby withdrawing the free end of the slider clear of the vanes since a wound negator spring 20 provides a relatively constant torque for a long period of time the illustion of frying bacon and eggs for example appears to be more real than ever with reference to fig2 and 3 the noise making means for making a noise simulating the noise made by a real frying pan while frying bacon or the like will now be described the noise making means comprises a roughened material or surface 76 on the undersurface of driven gear 44 preferably formed by securing a roughened material 76 by adhesive or the like to the lower surface of gear 44 the roughened material preferably comprises a support member 78 of suitable fabric or plastic material to which is secured upstanding needle like filaments 80 of a suitable material such as plastic a material that works satisfactorily.