Winter wonderland is Moominvalley Park's night illumination event. The theme park is not only lit up at night, but they also use props in the park to enhance the effect. Moreover, from this year, they are also using technology to enhance the experience. By downloading an app on your smart phone you can enjoy a vocal narration, at your own preferred pace, that complements the visual exhibits. The app uses Sound AR by Sony.
Please note that they request you use ear phones to listen to the narration. They also advise that you download the app in advance.