Grace and the monster

A little girl called Grace sees a castle in the distance of a forest. Longing to see the castle and its kings and queens, knights and princess' she runs into the forest.
After a short time of running she gets tired and doesn't notice the branch that trips her into a muddy puddle.
Urghs! Shes groans sitting up in the muddy puddle and trying to wipe the sludge from her eyes with her equally sludge ridden hands only making things worse. What am I to do now! She asks standing up from the puddle. I doubt theres any baths out here.
Suddenly the puddle begins to move the sludge on Grace' clothes following the puddle in a crazed rush as it all began to lift up and form the shape of a boy.
ROAR! shouted the muddy boy unrealistically like a monster.
Grace giggled and then began laughing as the boy tried his Monster roaring again.
Why are you not scared! shouted the boy angrily.
Well your just a little mud monster not a big mud monster. What are you going to do make my clothes muddy again?
The mud boy looked defiant at the little girl, I'm a mud monster in training not a little mud monster at all. I'm Huge and scary! ROAR!
Grace laughed again. Well funny little mud monster I better be going. Bye bye! She waved and began to walk along the forest path once more.
Hey wait! Yelled the mud boy. Where are you going?
To the castle. Grace nodded as she continued to walk.
Jogging up to Grace and keeping pace with her the mud boy followed. The CASTLE! he exclaimed. Why would anyone want to go there.
To see the king and queen and knights and princess' of course silly.
What are those?