The investigations are designed to be used by teachers, family child care providers and others who work with and care for young children. There are 2 series of investigation sample books: • One series is designed for preschool and kindergarten age children and, with minor adjustments, can be appropriate for children in the primary grades. • The second series is designed for infants and toddlers. Each investigation contains a series of engaging, open-ended experiences that inspire curiosity and inquiry as young children investigate important science topics.