A friend recently shared information about this new playspace in Jia-yi City. It looks really clean and has top-quality toys for kids to play with. The entrance fee for kids includes a snack.
You can look at this personal blog for some clear pictures of the play area.
Address: 嘉義市民族路83號4樓 (民族路與融和街口)
Entrance: Children 299元 (Includes snack and juice. Limited to 2 hours of playtime.) Adults100元(Includes 20NT discount on snacks). Babies under one year old 100NT, does not include any snack.