Description Marshmallow does not like being wet or covered in mud! See what's in store for this muddy pony. Make reading fun with MyCodables decodable books featuring Marshmallow the Pony! These engaging stories with familiar characters and fun illustrations will have young readers picking them up over and over. Skill Category: Other Spelling Patterns Phonics Focus: Inflectional Endings: -ed and -ing; Doubling Rule