Spiral Cone

Star Spiral Cone

Star Spiral Cone

Intersecting Cones

Nested Gears

Pentagon Wave

Sliding these pentagonal concentric rings back and forth creates an illusion of depth.

Material: laser-cut mat board

Geyser Ball Straw

Mixo Straw

Sand Shaper

By sequentially opening and closing different holes in the top two layers, different forms develop as sand is added and subtracted.

Work by John Edmark

Golden Angle

Work based on the Golden Angle, including 'Blooms', 3-D printed sculptures designed to animate when spun under a strobe light.
June 4, 2018/by Jesper Felumb Conrad


Work with spirals, including the 'Folding Spiral', which exhibits a surprising behavior when held aloft: the spiral rises up, seemingly defying gravity.
June 3, 2018/by Jesper Felumb Conrad


Works that rotate, including the 'Helicone', an interactive kinetic sculpture that instantly transforms between a helix and a pine cone with a simple, quick twist of the wrist.
June 2, 2018/by Jesper Felumb Conrad


Among the works, enjoy the 'Nested Fibonacci Tower' where nested frames are rotated by 137.5º (the golden angle) relative to each other, causing them to stack on top of each other.
June 1, 2018/by Jesper Felumb Conrad

Air and Water

Works using air & water. Among other installations you'll find the Geyser Wall, where ping-pong balls frolic among 12 geysers via Bernoulli's principle.
May 1, 2018/by Jesper Felumb Conrad


Miscellaneous works, from a puzzle that is a torture device for a perfectionist, to a four-legged chair that is a study in cooperation and interdependence.
April 1, 2018/by Jesper Felumb Conrad

Rough Sketches

Quick prototypes, from the 'Geyser Ball Straw'--a Proof-of-concept for a drinking straw toy--to the 'Star Spiral Cone', where twisting the spiral slightly causes the layers to overlap and form a cone.
March 1, 2018/by Jesper Felumb Conrad

Space Packings

These works use modular elements arranged in a periodic fashion to explore the fundamental structure of space.
February 1, 2018/by Jesper Felumb Conrad


Products and inventions from earlier years. You might be able to find some of them second-hand.
January 1, 2018/by Jesper Felumb Conrad