Lucia found an old coin in her backyard. She picked it up and brushed off the dirt.

The coin sparkled under the sunlight. It had strange symbols on it. Lucia felt curious.

'Wow, what could this be?' she wondered aloud. She decided to show it to her grandfather.

Grandpa was in the living room, reading a book. Lucia ran inside, holding the coin tightly.

'Grandpa, look what I found!' Lucia said, out of breath. Grandpa looked up and smiled.

Grandpa examined the coin carefully. 'This looks ancient and magical,' he said with surprise.

Suddenly, the coin glowed brightly. Lucia and Grandpa were transported to a mysterious forest!

Tall trees with sparkling leaves surrounded them. They could hear the sound of flowing water nearby.

Lucia held Grandpa's hand tightly. 'Where are we?' she whispered. They started walking cautiously.

They followed the sound of water and found a magical river. The water was shimmering and blue.

'This place is amazing!' Lucia exclaimed. Suddenly, a small fairy appeared above the river.

'Welcome to the Enchanted Forest,' the fairy said. 'The coin brought you here for a reason.'

'What reason?' Grandpa asked. The fairy smiled, 'To solve a mystery and save our forest.'

Lucia felt a sense of excitement. 'What do we need to do?' she asked eagerly. The fairy explained.

'There's a hidden treasure guarded by a dragon. The treasure holds the secret to our forest's magic.'

Lucia and Grandpa set out on their quest. They walked deeper into the forest, feeling brave.

After a long walk, they reached a dark cave. Lucia took a deep breath and stepped inside.

The cave was cold and damp. They saw a faint light coming from inside. They continued walking cautiously.

Soon, they saw the dragon sleeping on a pile of gold. Lucia's heart was pounding.

Grandpa whispered, 'We need to be very quiet.' They tiptoed closer to the treasure.

Lucia reached for the treasure carefully. Just then, the dragon opened one eye!

The dragon yawned and looked at Lucia. 'Who dares to take my treasure?' it roared.

Lucia felt scared but stayed calm. 'We need it to save the Enchanted Forest,' she explained.

The dragon listened and then said, 'If you can answer my riddle, I will let you take it.'

'What has keys but can't open locks?' the dragon asked. Lucia thought hard and answered, 'A piano.'

The dragon smiled and said, 'You are indeed wise. Take the treasure and save our forest.'

Lucia and Grandpa took the treasure and left the cave. They were filled with joy.

The fairy appeared and thanked them. 'You have saved our forest. Now, we will take you home.'

Lucia and Grandpa were transported back to their living room. The coin no longer glowed.