Fireworks mean and include any combustible or explosive composition, or any substance or combination of substances, or device prepared for the purpose of producing a visible or an audible effect by combustion, explosion, deflagration, or detonation, and shall include blank cartridges, toy pistols, toy cannons, toy canes, or toy guns in which explosives are used, firecrackers, torpedoes, skyrockets, Roman candles, bombs, sparklers, or other devices of like construction and any devices containing any explosive or flammable compound, or any tablet or other device containing an explosive substance, except that the term "fireworks" shall not include any auto flares, paper caps containing not in excess of average of .25 of a grain of explosive content per cap, and toy pistols, toy canes, toy guns or other devices for use of such caps, the sale and use of which shall be permitted at all times.