The Kourotrophos are (mostly) female deities who watched over growing children--Gaea, Artemis, Hekate, Eirênê, Aglauros and Pandrosos, especially. This specific offering is known from the demos Erkhia (or Erchia), but duplicates similar offerings on the Acropolis of Athens.
In this ritual, we honor Artemis and Hekate. Artemis is named Kourotrophos by Diodorus Siculus, a Hellenic historian, in book five of his library:
"And Artemis, we are told, discovered how to effect the healing of young children and the foods which are suitable to the nature of babes, this being the reason why she is also called Kourotrophos." [5.73.5]
Hesiod, in his 'Theogony', explains why Hekate is Kourotrophos:
"So, then. albeit her mother's only child, she is honoured amongst all the deathless gods. And the son of Kronos made her a nurse of the young who after that day saw with their eyes the light of all-seeing Eos (Dawn). So from the beginning she is a nurse of the young (kourotrophos), and these are her honours." 
You can find the ritual here. The festival will be held on the 30rd of August, at 10 AM EDT, and we would love to have you join.