The Forest of Time: Children of the Stone (The Forest of Time #1)

Deep in the heart of an enchanted forest, a small village of children lives unaffected by the passage of time thanks to a powerful stone that protects them from it. But when the stone is shattered and a thief runs off with one of the shards, four of the children must set out at once in search of the missing shard before their village is swallowed up by time and everybody in it dies. Armed with four crystals with special powers, the children bravely make their way through the dangerous forest to hunt down the thief, making friends and enemies along the way and encountering one strange creature after another.