What are the laws for the State of MN and the City of Minneapolis regarding the use of non-lethal self defence weapons?

what types of weapons are legal?

to what ages?

in what circumstances?

the reason i ask is for my littler sister and her friends…they are reaching pre-teen age ad are starting wander farther than just neighborhood….i want them to be safe

thanks for the help everyone

Namaste’ ~ Sunya