Plan lessons from a child-centered perspective! This innovative resource features more than 1,000 activities using inexpensive, readily available objects to eng

Our encounters with the physical world are filled with miraculous puzzles-wind appears from somewhere, heavy objects (like oil tankers) float on oceans, yet sma

Originally published as catalogue 100 of Antiquariaat FORUM in 10 issues between 1994-2002. With an extra issue with extensive indices. The print edition is ava