This video shows how to build an icosahedron out of paper plates, cups, or plastic sheeting -- and pack some geometry into your next picnic!

Like other projects from the MAKE quarterly, this can be fun for the whole family. Brought to our attention by Math Forum community member Art Mabbott, MAKE "celebrates your right to tweak, hack, and bend any technology to your own will."

**
Picnic Geometry Instructions
**

http://blog.makezine.com/archive/2006/08/weekend...geomet.html

MAKE's accompanying post provides step-by-step instructions for assembling icosahedra from picnic supplies.

**Fractal Science Kit**

http://www.fractalsciencekit.com/

The Fractal Science Kit provides an interactive programming environment with windows for viewing the fractal image, modifying the properties that define the fractal, examining the data behind the fractal, and viewing/editing the programs, macros (inline functions/methods), and color gradients used to produce the final image. Ross Hilbert offers a 15-day trial version of his software.

Areas of his site include:

- Gallery
- Tutorials
- Product Overview
- Fractal Types
- Application Windows
- Properties Pages
- Programs
- Programming Language
- L-System Language
- Built-in Programs
- Special Topics
- Installation and Support

**Exploring Advanced Euclidean Geometry with Geometer's Sketchpad**

http://www.calvin.edu/~venema/eeg/eeg.html

Gerard A. Venema offers a sequence of PDFs that show how to use dynamic visualization software to explore topics such as:

- The classical triangle centers
- Advanced techniques in GSP
- Circumscribed circles, inscribed circles, and escribed circles
- The medial and orthic triangles
- Quadrilaterals
- The nine-point circle
- Ceva's Theorem
- The Theorem of Menelaus
- Circles and lines
- Applications of the Theorem of Menelaus
- More topics in triangle geometry
- Inversions in circles
- The Poincaré disk

Each file is 0.2MB or smaller. The complete sequence runs 121 pages, and features a table of contents, bibliography, index, and some formal proofs.

**
The Geometer's Sketchpad
**

http://www.keypress.com/x5521.xml

Download an instructor's evaluation edition, get LessonLink activities, and find more resources for teaching and learning with dynamic visualization software from the makers of Geometer's Sketchpad.