Once upon a time there was a little magling named Maggy, she was made of magma. Maggy was just enjoying the beautiful really really hot weather inside her volcano.
Then one day there was a loud bang and suddenly Maggy was trapped outside her volcano.
Due to cooling and crystallization she transformed into an igneous rock, sadly it was raining so due to weathering and erosion she transformed, again, into sediment.
Maggy was just on a walk when she fell into the ocean, there was lots of pressure so due to compacting and cementation she was transformed into a sedimentary rock. Then she was washed up onto the shore.
After she was washed up onto shore she couldn´t move, so Maggy stayed there. Overtime she sunk down into the earth, due to heat and pressure she was transformed into a metamorphic rock.
After she transformed into a metamorphic rock she thought she would never turn back into magma, until it got really really hot and due to melting she finally transformed back into magma. And finally her immense journey was over.