Under 21, concealed carry of a "deadly weapon" is prohibited, but only a gun is specifically defined as a "deadly weapon". Any other item would likely be considered on a case-by-case basis, in court. Over 21 and open carry are unrestricted. There is no such thing as an illegal knife in AZ.
It is perfectly legal to carry most knives while on your motorcycle in the state of Arizona. However if you intend to carry a large knife, like a hunting knife in a concealed manner, you will need a permit.
A sheath is used to carry a knife; if the knife is very large, this might be called a scabbard.
Best answer I can think of is NO Unless the Kid is in Scouts or something related. I suspect the question is related to self defence, Then the answer is a DOUBLE NO !!!!!!You would only get into a whole world of hurt ..... And most likely your own.
Large knife
A large, strong clasp knife for the pocket; a pocket knife.
Machete
By and large Karambit knives are utility knives, tools, as opposed to weapons. Most appear to have blade lengths of less than 2 inches. So long as the knife is not concealed, it generally would not be illegal to carry in any state. The only place every knife is illegal in the US are airports.
In India, the legal regulations around carrying knives can vary by state and municipality. Generally, it is not permitted to carry a knife in public without a valid reason, such as for work or self-defense in certain areas. It is important to check the specific laws in your area to ensure compliance with local regulations.
macheri
Phoenix.
machete
A balisword is an exceptionally large balisong knife.