In the state of NY it is assur to serve alcohol to a minor. Kiddush is an exception and it is a small amount, plus no one is driving after making kiddush.
Really? Is there an exception for kiddush?
There is an exception if you are the parent or guardian–then you are allowed to give whatever you want.
There is also an exception if it is for instructional purposes in a school as part of a curriculum–I’m not sure purim in yeshiva counts, but I’d sure argue it.
A person is guilty of unlawfully dealing with a child in the first degree when: […]
2. He gives or sells or causes to be given or sold any alcoholic beverage, as defined by section three of the alcoholic beverage control law, to a person less than twenty-one years old; except that this subdivision does not apply to the parent or guardian of such a person or to a person who gives or causes to be given any such alcoholic beverage to a person under the age of twenty-one years, who is a student in a curriculum licensed or registered by the state education department, where the tasting or imbibing of alcoholic beverages is required in courses that are part of the required curriculum, provided such alcoholic beverages are given only for instructional purposes during classes conducted pursuant to such curriculum.It is no defense to a prosecution pursuant to subdivision two of this section that the child acted as the agent or representative of another person or that the defendant dealt with the child as such.