''On a hot day...' Volume 15 explains play between two people on a hot with a small pool. 'On a hot day...' PreReader Product Volume 15 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.