Looking for a double pendulum and/or material to make one?

Where do I get the material to make a chaotic double pendulum. In fact I have a very tight time schedule - need this for delivering a lecture - so was wondering if someone has a double pendulum that they can provide (I tried chaoticpendulum.com but its all sold out). Thanks.?

rickharris7 years ago
Thick cardboard should work joined with a paper rivet (clip ) or nut and bolt.