Abstract: An alarm plug tube of electrically insulative material in a box has electrical contacts in spaced relation. An alarm circuit in the box is electrically connected to the electrical contacts for indicating when the electrical contacts are in electrical connection. The alarm circuit has a battery, lamps and an audible alarm connected to the electrical contacts. An alarm plug of electrically insulative material has raised electrically conductive contact plates extending from the surface thereof in spaced random relation whereby a player attempts to withdraw the alarm plug from the alarm plug tube without electrically connecting the electrical contacts of the alarm plug tube via the contact plates of the alarm plug. A timer and a switch in the box are electrically connected in circuit with the audible alarm and the battery for determining a period of time during which a player attempts to remove the alarm plug from the alarm plug tube. The switch neutralizes the timer and the audible alarm when opened.