Nootropic Design will offer this as a kit later this fall. Only the electronics will be in the kit — nothing that looks like dangerous explosives! With some imagination, I’m sure you can make a great looking Defusable Clock, but don’t go scaring anyone with it, and don’t bring it anywhere near an airport, ok? The product page will have plenty of warnings not to use this kit for any evil purposes or get into trouble with your school, employer, or local law enforcement! There will also be a picture gallery where you can submit a picture of your clock after you build it.
If you would like to be notified by email when you can purchase the kit, sign up here: http://nootropicdesign.com/lists/?p=subscribe&id=6