Sekku Ningyo dolls are dolls displayed during seasonal festivals like Hinamatsuri (Doll Festival or Girls' Day) and Tango no Sekku (Children's Day). These dolls, representing figures like emperors, empresses, and warriors, are crafted from materials like wood and silk. They symbolize prayers for children's health, happiness, and success. Passed down through generations, Sekku Ningyo dolls are a significant part of Japanese cultural heritage, celebrated annually in homes across Japan.