KnetzgerBob - Make: Fire: the art and science of working with propane

Make Fun!

Create Your Own Toys, Games, and Amusements

By Bob Knetzger

Copyright 2016 Bob Knetzger. All rights reserved.

Printed in Canada.

Published by Maker Media, Inc.,

1160 Battery Street East, Suite 125,

San Francisco, California 94111

Maker Media books may be purchased for educational, business, or sales promotional use. Online editions are also available for most titles (safaribooksonline.com/). For more information, contact our corporate/institutional sales department: 800-998-9938 or corporate@oreilly.com.

Publisher: Brian Jepson

Editor: Roger Stewart

Copy Editor: Elizabeth Campbell, Happenstance Type-O-Rama

Proofreader: Elizabeth Welch, Happenstance Type-O-Rama

Interior and Cover Designer: Maureen Forys, Happenstance Type-O-Rama

Compositor: Maureen Forys, Kate Kaminski, Happenstance Type-O-Rama

Indexer: Valerie Perry, Happenstance Type-O-Rama

April 2016: First Edition

Revision History for the First Edition

2016-04-25: First Release

See oreilly.com/catalog/errata.csp?isbn=9781680450873 for release details.

Make:, Maker Shed, and Maker Faire are registered trademarks of Maker Media, Inc. The Maker Media logo is a trademark of Maker Media, Inc. Make: Fun! Create Your Own Toys, Games, and Amusements and related trade dress are trademarks of Maker Media, Inc.

Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and Maker Media, Inc. was aware of a trademark claim, the designations have been printed in caps or initial caps.

While the publisher and the author have used good faith efforts to ensure that the information and instructions contained in this work are accurate, the publisher and the author disclaim all responsibility for errors or omissions, including without limitation responsibility for damages resulting from the use of or reliance on this work. Use of the information and instructions contained in this work is at your own risk. If any code samples or other technology this work contains or describes is subject to open source licenses or the intellectual property rights of others, it is your responsibility to ensure that your use thereof complies with such licenses and/or rights.

978-1-457-19412-2

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Make:

1160 Battery Street East, Suite 125

San Francisco, CA 94111

877-306-6253 (in the United States or Canada)

707-639-1355 (international or local)

Make: unites, inspires, informs, and entertains a growing community of resourceful people who undertake amazing projects in their backyards, basements, and garages. Make: celebrates your right to tweak, hack, and bend any technology to your will. The Make: audience continues to be a growing culture and community that believes in bettering ourselves, our environment, our educational systemour entire world. This is much more than an audience, its a worldwide movement that Make is leading we call it the Maker Movement.

For more information about Make:, visit us online:

• Make: magazine makezine.com/magazine
• Maker Faire makerfaire.com
• Makezine.com makezine.com
• Maker Shed makershed.com

To comment or ask technical questions about this book, send email to

First off, BIG thanks to my wife Deborah who in addition to being a tireless supporter and huge help to me on this book as editor and proofreader is a world-class maker herself. Shes helped me on hundreds toy projects as researcher, seamstress, designer, hand model, voice-over talent, toy tester, artist, game player, sounding board, and all-around life-long collaborator. Thanks and love, Deb.

My daughter, Laura, pitched in to test, make, and help photograph several of the projects in the book. Shes also a fine cartoonist and drew the fun little MakeyBot mascot illustrations.

My son, Reed, helped me build and test the strip heater project, although he had an ulterior motive in getting a custom-built part for his sports car. (I encourage all parents to make stuff with their kidsyoull learn a lot!)

Some of these projects are spin-offs of things I had created with my toy-design business partner Rick Gurolnick. Thanks, Rick, for making NeoToy with me. Your cleverness, business sense, and humor are inspiring.

Mark Frauenfelder asked me to write for Make: magazine, starting way back on volume 11. He was a writers dream editor-in-chief; full of encouragement for my DIY projects, along with enthusiastic and creative guidance for my editorial articles, some of which are contained here. Makers: it takes one to know one. Thanks, Mark.

This book wouldnt have happened without the dedicated work of all the people at Maker Media. Gratitude is due to my book editor and fellow pop culture fan Roger Stewart for championing a fresh new design for this book, along with editor Brian Jepson, wordsmith Elizabeth Campbell, and layout whiz Maureen Forys. My thanks also to Make: magazine editor Keith Hammond, who keeps it all going smoothly. Goli Mohammadi and Katie Walker Wilson helped make things look great and Jeffery Braverman, along with Gregory Hayes, took some nifty photos! And of course thanks to maker-in-chief, Dale Dougherty. Together weve had more than few issues at Make: magazineall of them good!

A special tip of my safety goggles to Make: readers who generously shared their creations and photos. Thanks to David Corina, Troy Fischer, Pat and Francis Fullam, Derek Gable, Doug Stith, Kurt Gulatieri, Jack Knetzger, Greg Lehman, Bob Marino, Richard and Julie Shiffman, Steve Wacker, John Diehl, and the Girl Scouts Heart of the Hudson.

Thanks to these esteemed toy industry professionals for help with research on the Marvin Glass article: George Gomez, Eddy Goldfarb, Richard Levy, and Pauline Camberlis.

Bob Knetzger

Bob Knetzger has been making fun stuff all his lifefirst as a kid with his trusty VacUForm and Thingmaker toys, then as a professional toy designer at Mattel, and for the last 35 years as an independent toy inventor. Bobs designs for toys and games have appeared on television, in hundreds of millions of cereal boxes, in the pages of