This podcast episode explores the history, significance, and popularity of mortise and tenon building blocks, a distinct type of toy with traditional Chinese craftsmanship. The episode delves into the construction method of mortise and tenon, highlighting its long history and unique characteristics. It also discusses the differences between Chinese-style building blocks and Legos, as well as the growth and potential of the building blocks industry. The podcast explores the appeal of building blocks to people of different age groups, emphasizing their educational value and cultural significance. Additionally, the episode addresses the ethical and legal issues surrounding businesses using photos of customers without their permission.