Bob Knetzger

Bob Knetzger

Bob Knetzger ([email protected]) is an inventor/designer with 30 years of experience making fun stuff.

Latest from Bob Knetzger


Reminisce about the melodic toys of yesteryear and learn how to make your own. Read more »


Perhaps the most iconic 80s music toy was the Magical Musical Thing from Mattel. The TV commercial featured a kid playing melodies with one finger on the toy’s keypad strip — and finishing by playing it with his head! Now you can make your own custom version! Read more »

hummingbird feeder.2

Stop ants from getting into your hummingbird feeder with a DIY moat. Read more »

Fig. F: Flip!

Make your own custom shaped cookie cutters two ways: either traditional aluminum or vacuum formed plastic. Read more »


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