It should be like in Vermont, no permit needed to carry concealed. If under the age of sixteen you need permission from a parent to carry concealed. They do offfer permints.
Check this out: /www.usacarry.com/vermont_concealed_carry_permit_information.html
Arizona is another state that you can carry open or concealed with out a permit, I didn't look up the age restrictions. They to offer permits.
Here in Washington State no permit required to buy, sell, trade or to open carry. A conceal carry permit is required to conceal carry.
Pennsylvania is probably the easiest State in the Country to get an Out of State Full Carry Pistol Permit.