"Freedom to live and to think about life for its own sake is important and even essential to a child. Since we can't know what knowledge will be most needed in the future, it is senseless to try to teach it in advance. Instead, we should try to turn out people who love learning so much and learn so well that they will be able to learn whatever needs to be learned." -John Holt.
Thursday, July 22, 2010
Wind detector 22 July 2010
A simple home wind detector to measure how hard the wind is blowing.
a thick cardboard, thin cardboard, tin foil, writing paper & tissue paper.