Meliscellaneous

http://robertsabuda.com/popmakesimple.asp

[link from Meggiecat]

also-

Lemelson-MIT Program

http://web.mit.edu/invent/invent-main.html

Invention Dimension is a fun-filled and at times wacky approach to making learning about invention exciting for the kid in all of us. Have some fun with our invention games and explore the wealth of inventor and invention resources, including inventor profiles and patent guidelines.

 

from http://www.pims.math.ca/knotplot/

Here you will find a collection of knots and links, viewed from a (mostly) mathematical perspective. Nearly all of the images here were created with KnotPlot, a fairly elaborate program to visualize and manipulate mathematical knots in three and four dimensions. You can download KnotPlot and try it on your computer (see the link below), but first you may want to look at some of the images in the picture gallery.

http://www.math.nus.edu.sg/aslaksen/gem-projects/maa/0203-2-03-Escher/main.html

A toy with tesselated shapes – Soft Lizards

http://www.constructiontoys.com/store/ipr-lizards.php

http://www.georgehart.com

Also – There is a nice Encyclopedia of Polyhedra at georgehart.com

http://www.georgehart.com/virtual-polyhedra/vp.html 

We like the Cortona VRML client to view the models

http://www.parallelgraphics.com/products/cortona/

http://www.edwardrhamilton.com

http://www.bookfinder.com

http://www.bestwebbuys.com/books/

http://www.bookcloseouts.com

http://www.philtulga.com/

http://www.peepandthebigwideworld.com/activities/

http://www.nga.gov/kids/kids.htm