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Bob Knetzger
Bob Knetzger (neotoybob@yahoo.com) is an inventor/designer with 30 years of experience making fun stuff.
Latest from Bob Knetzger
10/30/2019
Here’s a fun and easy action game: the Spin ’N Spill Balancing Bot. Stack the gears onto the tippy balancing...
01/22/2019
Upcycle a vintage plaything as a showpiece, comix rack, and reading lamp!
10/10/2018
2018 is the 50th anniversary of the introduction of Hot Wheels, Mattel’s line of die-cast toy cars. You can celebrate in...
07/12/2018
Hack a click pen to make a mini pinball game.
11/03/2017
In two easy steps, you can use these free downloadable stencils to decorate your windows for the winter holidays.
07/28/2017
Jay Silver’s 2008 Drawdio combines a simple 555 timer circuit with a pencil to make squeals, beeps, and other musical...
07/05/2017
These string racers climb up strings by using friction and alternating tension/slack. Make two and race to the top!
03/02/2017
Whizz it around your head and hear it roar!
11/03/2016
Laser cut this slot-together raceway and for a fun, gravity-powered racing game.
06/27/2016
Use moldable plastic to create great new practical jokes!
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