Giant hydatid cyst in spleen is rare in the pediatric age group. We came across two cases of giant splenic hydatid cysts in pediatric age group, out of which, one case had pulmonary, liver and splenic hydatid cyst which was managed with single stage approach. As a single stage approach is a novel method with less morbidity, it should be adopted as a preferred method for the management of pulmonary and abdominal hydatidosis. Hydatid cyst is described as a slow growing cyst in literature, but the presentation of giant size hydatid cyst in our 7 and 12 year old child is difficult to explain by this concept of slow growth.