In recent years, a great concern has been expressed for consumer protection and safety, especially for children. As an outgrowth of this concern, acoustical testing of potentially hazardous noise‐producing toys has been carried out at the National Bureau of Standards for the Bureau of Product Safety (FDA). This talk will discuss the work that has been done on cap pistols and carbide cannons. The discussion will focus particularly on the development of a standard firing apparatus for testing paper caps, and on the problems encountered and the solutions arrived at for testing carbide cannons.