Due to the non-existence of "Royal Zwolle Castle" as an attraction, its family-friendliness cannot be assessed.
Given that "Royal Zwolle Castle" is not a public attraction that exists, its family-friendliness cannot be determined.
However, Zwolle as a city offers several family-friendly activities. For instance, children might enjoy exploring the city's historic center, taking a boat tour on the canals, or visiting the Dinoland Zwolle theme park, which is specifically designed for families with children. Museum de Fundatie occasionally hosts workshops or special tours tailored for younger audiences.
When considering other castles in the Netherlands, many are designed with family visits in mind, offering special children's routes, treasure hunts, or interactive exhibits. It is always recommended to check the specific attraction's website for information on family programs and facilities.