Carolyn P. Edwards
The Hundred Languages of Children: The Reggio Emilia Approach

David Elkind, Ph.D
The Power of Play

Dr. Stuart Brown
Play: How it Shapes the Brain, Opens the Imagination and Invigorates the Soul

Vivian Gussin Paley
A Child's Work: The Importance of Fantasy Play

Cathy Weisman Topal, Lella Gandini
Beautiful Stuff: Learning with Found Materials