Fiber Optic Cactus Lamp

Vintage fiber optic lamps like this one are available on eBay most of the time:

From eBay:

**BUY NOW Vintage Fiber Optic Flower**

Reflection Symmetry Sculpture by Steinbach

This sculpture and others available here:

From eBay:

**BUY NOW Steinbach Reflection Scupltures**

Homopolar Motor

Fairly simple to make- here are the inexpensive supplies needed to make a few of these motors.

AA batteries have a diameter of 14.5 mm, so a bottom magnet with a diameter of 15 mm is just right:

From eBay:

**BUY NOW Neodymium Disk Magnet**

Wire that looks and works well is just 10 gauge ground wire. Inexpensive and available at any local hardware store-- or order a small quantity here:

From eBay:

**BUY NOW 10 gauge Copper Wire**

Wikipedia has some good details on the physics of homopolar motors

Tumble Rings

I made this set of tumble rings from reading Martin Gardner's description in his famous mathematical recreations books- highly recommended:

From Amazon:

**BUY NOW Knots and Borromean Rings by Martin Gardner**Describes the Tumble Rings

From Amazon:

**BUY NOW Books on recreational math and puzzles by Martin Gardner**Lots of physics and math toys in these pages!

Mega-Tippe-Top

Here is the mega tippe-top compared to typical tippe-tops on the market and a US quarter dollar:

Limited quantities available from the Spinning Top and Yo-Yo Museum of Burlington, Wisconsin

Educational Innovations has reasonably priced wood tippe-tops in their shop:

From Educational Innovations:

**BUY NOW Tippe-Tops**

From Amazon:

**BUY NOW Tippe-Tops**

Aluminum Tippe-Top

Get one here:

From Amazon:

**BUY NOW Aluminum Precision Tippe-Top**

Fine Wood Tippe-Top

From the Etsy Store of Neal Brand. See his selection of hardwood tops here:

From Etsy:

**Tippe-Tops by Neal Brand**

Check out my short blog post on the history and physics of the Tippe-Top

South Pointing Spoon:

From Grand Illusions Ltd:

**BUY NOW Ancient Compass Replica**

Airplane Glory

Wikipedia has this introduction to the phenomena of the Aircraft Glory

For a detailed discussion with math, see this entry from the Physics Stack Exchange

Shadow Stereographic Projection

These mathematical art objects are created by Henry Segerman and available here:

From Shapeways:

**BUY NOW Mathematical Art**

Wikipedia has a nice introduction to the math and applications of stereographic projection.

Curves of Constant Width

Get a set here:

From Maths Gear:

**BUY NOW Curves of Constant Width (set of 4)**

Andrus Tri-Zonal Space Warper

Available here:

From Amazon:

**BUY NOW Andrus Tri-Zonal Space Warper**

From eBay:

**BUY NOW Tri-Zonal Space Warper**

Magician and professor of psychology Richard Wiseman describes the genius of Jerry Andrus and the psychophysics of the Space Warper.

**Click here for more:**

**Physics Toys,**

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