Bob's Burgers season 8 episode 10
Episode title: The Secret Ceramics Room of Secrets
When the kids are given the task of making homemade gifts for their grandma's birthday, they set out to find a secret room filled with homemade ceramics which, according to urban legend, has been boarded up for years at their school. Meanwhile, Teddy starts a phone repair service and the adults become determined to improve his online rating.
