Band saw

Cat Scratch Feeder

Cat Scratch Feeder

Build a snack-dispensing scratching post that will make Kitty forget the couch and curtains.

Convert a Used Dishwasher into a Spray Paint Booth

Convert a Used Dishwasher into a Spray Paint Booth

Many years ago I replaced my dead dishwasher with a new one. Before hauling the old one to the dump I figured I would try to convert it into a spray paint booth. My at-the-time booth was a cardboard box, with an old cookie sheet, sitting over a large trash can and it did not […]

The BeatBearing Tangible Rhythm Sequencer

The BeatBearing Tangible Rhythm Sequencer

The BeatBearing is an exciting and intuitive way to make music. Move the balls on a grid, and you change the beat. Music sequencing couldn’t be simpler. Like countless other musicians, I use a computer to create beats and sequence them into mixes. Pointing and clicking with a mouse is fine for a studio, but […]

Egg Heads Puzzle

Egg Heads Puzzle

As a retirement present for Joe Malkevitch, a geometer friend who likes puzzles, I designed and built this 1′-diameter Egg Heads puzzle from ¼” walnut. Many of my sculpture and puzzle designs require laser-cutting or other computer-guided fabrication technology to accurately produce intricate parts. But this design is simple enough that you can make the […]

Marble Adding Machine

Marble Adding Machine

Computers add binary numbers constantly, but we never see how. This elegant machine does the math using glass marbles. I started building marble track machines years ago using Lego. I experimented with all sorts of crazy ways for the marbles to descend. One was a rocker that shunted a stream of dropping marbles one-by-one to […]

The UnaBox

The UnaBox

My architect friends Lorenzo Bini and Roberta Pezzulla made this little project for a very young and dynamic client: Lorenzo’s 6-month-old goddaughter. They wanted to make a box that the child could use her whole life to store small, personal, precious things. So they created the UnaBox, taking inspiration from an Indian box (by an […]