Upon birth, all Sprites inherit a Contract that first tied their ancestors to the Household Forces.
Each Sylph knows they came Out of the Draft and is granted by their bond to Household Air both the lightness of their Folk, and the gift of Bloating.
Each Undine knows they came Out of the Drain and is granted by their bond to Household Water both the heftiness of their Folk, and the gift of Water Retention.
Each Salamander knows they came Out of the Spark and is granted by their bond to Household Fire both the promptness of their Folk, and the gift of Enlightenment.
The counterpart is identical for all Sprites, who are bound by the Coin accepted as payment. All littlings of this Folk have to stay true to any written or oral agreement in which, after regular and free negotiation, they accept any sum of money in exchange of services. If they ever fail to comply, they face Terrible Terrible Things.