Mayso is a bookshop, stationery store and toy shop based in Santiago de Compostela, serving customers through its online store. Its selection brings together books, school and creative supplies, games and toys for children from infancy through age 12, alongside options for older readers and families. The book range includes children’s and young adult titles, novels, science fiction, textbooks and books in Galician. Stationery products include items for school, crafts and everyday creative projects.

Mayso offers toys and learning resources across a wide range of interests, including puzzles, construction sets, board and card games, science and STEM activities, music, dolls, vehicles, outdoor play and imaginative play. Its catalogue also features materials for sensory activities, balance, psychomotor development, fine and gross motor skills, emotions, language learning and special education. Products are organised by category and age to help shoppers find suitable choices. Mayso invites customers to shop with a small local business and states that orders can be sent to their homes.