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What u actually mean? Alms or Arms?
Alms can be meant as Pocket money ( though actual meaning is what we give to the beggars)
Arms: Fire Arms, i.e. Pistols , Revolvers etc.
So far Alms ( Pocket Money) is concerned, I'm in favour of giving them a moderate amount (a balance between very high and very low). Very high will result in Indulging in bad habits; and very low will indulge them to pickpocket from parents purse.
So far Arms ( Fire Armms) r concerned, u can give them toy pistol when they r child, and Air Gun when they r little older. But never give them actual firearm, they may become murderer or get murdered .