Month: November 2010

Math Monday: Giant wobbler

Math Monday: Giant wobbler

A “wobbler” consists of two intersecting circles in perpendicular planes. When you roll it along the ground, it wobbles left and right as it moves forward. I saw these 18″ diameter pine disks for sale at a lumber store and thought they would make a wonderfully large wobbler. The construction simply involves cutting a slot […]

How-To: Make an inverting top

An inverting or tippe top is a classic physics toy: a spinning top that spontaneously inverts itself to spin on its handle at high speed, then rolls back over onto its base when it stops. Turns out, four spheres joined in a close-packed tetrahedron will do the same thing, and this quick video tutorial from YouTuber VTK9990 shows one made from four marbles and some epoxy. [via The Automata / Automaton Blog]

Top 10: Notebooks and pens

Our quarterly theme of Tools for Creativity continues with this roundup of excellent pens and notebooks to help you express your creativity. #10 XY servo sandbox drawing tool #9 How-To: “Indestructible” 3-ring binder #8 Brand name pencils #7 Hypotrochoid-drawing robot #6 Designer Moleskines #5 IR laser wood-burning pen #4 Tesla CD turbine pencil sharpener #3 […]