The new series follows the adventures of seven children who have formed a secret club in a shed at the bottom of the garden. The series includes six titles of page turning adventures! Pan mae'r Saith Selog yn ymweld hen dy gwag, maen nhw'n sylweddoli nad ydi o'n wag wedi'r cyfan! A fyddan nhw'n gallu dianc ar l cael eu cloi yn yr hen le dychrynllyd