1990 - Magnets and How to Use Them (Paperback) → Paperback ISBN-13: 9780590024280 ISBN-10: 0590024280 Genre: Children's Books ? 1989 - The Snow Party (Hardcover) → Hardcover ISBN-13: 9780688085711 ISBN-10: 0688085717 Genre: Children's Books 1 1973 - How to Write Codes and Send Secret Messages (Paperback) → Paperback, Hardcover ISBN-13: 9780590026062 ISBN-10: 0590026062 Genre: Children's Books 2 |