How to Build a Catapult



A neat How-to on building your own office irrigation system. There are retail systems for over $60, but this DIY version can come in around $30 or so. Pump, tubing, connectors, dripper, timer, a few other things- and you’ll have the greenest cube. Link.



Make reader Ron sent this in- looks interesting, anyone try it? Might be good for some prototyping. ShapeLock is a super strong plastic similar to Nylon or Polypropylene in toughness. However, unlike the two former plastics it does not need high temperatures or high pressures to form into useful shapes. ShapeLock is easily hand-formed into shape at just 150 degrees Fahrenheit. Link.