With Instructables you can share what you make with the world, and tap into an ever-growing community of creative experts.
Here we are. My 4th knex ball machine. It has a total of 9.2 paths, 7 new elements, about 50' of track, and 4 lifts, including Shadowman39's double ...
Join 2 million + to receive instant DIY inspiration in your inbox.
Download our apps!
© 2016 Autodesk, Inc.