A book for second graders that makes learning "why?" and "how?" fun. - Title: Why? How? Science Stories for Second Graders Why? How? Everyday Mysteries for Second Graders - Publisher: Gakken - Grade Level: 2nd Grade - Contents: 42 stories full of "mysteries" you can read right away 40 stories that answer "questions" you want to know Thank you for looking. There are no noticeable stains, but for those who understand that this is a used item, thank you for your understanding.