Sarah Trading Erasmus is a local business in Seia that collects used clothing, shoes, and toys to promote recycling and reduce waste, creating jobs and impacting the economy. The Toy Museum in Seia, established in 2002, showcases a collection of over 8,000 toys, celebrating childhood through various themed sections and temporary exhibitions. Additionally, Quinta D. Maria produces traditional cheese, while the Ara shoe factory has been a key player in local industry for six decades, showcasing technologically advanced manufacturing.