The Psammead Trilogy

Edith Nesbit was a prolific English author best known for her children's literature. One of her notable works is the "Psammead trilogy". The series revolves around a group of siblings who discover a magical creature called the Psammead, also known as "It," which has the power to grant wishes. However, the wishes often lead to unexpected and humorous consequences, teaching the children valuable lessons about responsibility and the consequences of their actions.
The books in the series include "Five Children and It", "The Phoenix and the Carpet" and "The Story of the Amulet".