What did Kira Thomas and Matt find in gathering blue?

In "Gathering Blue" by Lois Lowry, Kira, Thomas, and Matt discover a hidden room in the council Edifice where Kira's father worked. Inside, they find examples of beautiful embroidered cloth, supplies for dyeing, and a loom. This discovery leads Kira to realize the value of her talents and the possibility of creating something meaningful for her community.