After a long wait the ice skating track is open on Lake Jyväsjärvi. It is most conveniently accessed from the harbor area. I'm not exactly sure but I would guess that the track is at least a few kilometers long if you skate the full loop. There is also a cross country ski track that follows along next to the skating track.
The Kotakahvila offers hot beverages as well as kicksled rentals. According to the sign, the sleds rent for 5€/hour.