'Snowball' Volume 14 explains using nature wearing mittens to make something - a snowman Description and Purpose PreReader Sentence Story in a Story 'Snowball' PreReader Product Volume 14 was designed as an assisted learning aide in word recognition and beginning comprehension through visual representation-to understand and to be able to read a complete sentence with comprehension. In this Pre-Reader the sentence comprehension is also to put together several sentences that read to the reader a story-sentence story with a complete story combining all sentences to give the reader additional information for a bigger story.