I and many of my fellow educators at the Children's Museum of Houston have long held a belief that children need to be provided with a free-choice learning environment that stimulates hands-on, minds-on, open-ended explorations into phenomena to help them construct their understanding of topics that interest them. We believe that what we and other children's museums and science centers provide is access to application of ideas and phenomenological explorations that often fly in the face of "common sense understanding."