The Fairy King (1998)

When Kyle (Jameson Baltes) and Evie (Brittney Bowman) Preston start exploring the grounds of their late grandmother's house they discover an old, abandoned mine shaft and soon find that the old lady's stories about fairies trapped underground were true. Imprisoned many years ago by two battling giants, the fairies now risk being lost forever unless Kyle and Evie can find a way to help them. The task becomes even more urgent when the children's father (Corbin Bernsen) is taken ill, and they need the fairies to cure him with their magic