“ As women are expected to follow all negative commandments, regardless of whether or not they have a specified time, they are thus obligated to say Kiddush regardless of their exemption from other positive commandments related to a particular point in time. ”

“ A boy who knows how to say the Shema properly and understands the significance of the mitzvah is thus obligated to do so.
Exempt: In Kiddushin 29a, the Gemara explains that women are exempt from positive commandments for which there is a Biblically-established time in which they must be performed. (Such as the Shema.) Some commandments, however, while lacking a Biblically-established time for fulfillment may have a Rabbinically-established time (such as the Amidah) and women are thus obligated to fulfill those. ”