§ 63-a. Purchasing property from a child. No owner, keeper or proprietor of a junk shop, junk cart or other vehicle or boat or vessel used for the collection of junk, or any person in the employ of such owner, keeper, or proprietor, or any collector of junk, shall receive or purchase any goods, chattels, wares or merchandise from any child under the age of sixteen years. It shall be no defense to a prosecution for a violation of this section, that in the transaction upon which the prosecution is based the child acted as the agent or representative of another, or that the defendant dealt with such child as the agent or representative of another.