Timely ideas and information, with daily updates. Frequently Asked Questions Thousands of web sites for educators and students. Support for long-term classroom planning and professional development. Information covering important topics for today's educators and parents. It has interactive demonstrations, scientific explanations, and illusion artwork.
Visitors can also find interactive puzzles and suggested reading lists.
The illusions are accompanied by a description of things to do and notice, an explanation of what is causing the effect, and the illusion's history. M.C. Escher are displayed in a virtual gallery. The vanishing egg puzzle is one of the interactive activities on the site. When the pieces of the puzzle are moved around a different number of eggs appear to be present. One movie on the site shows two men standing on a balanced plank with the man on the right appearing to be taller than the man on the left.