How do you explain the development of software to students in second?

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First accepted Submitter Zimanyi wrote Being the start of the school year, teachers of my children invariably ask if all parents have special skills they may have for students. As a software engineer, I want to make a presentation to the classes to develop software.

The difficult part is a presentation entertaining, inspirational, easy enough for students in second and fourth to grasp. Has anyone been brave enough to attempt such a thing? Are there any kid-tested packaged presentations freely available? Would it be better to present the development of a simple game? Web page? Any advice is welcome.