So I've been wanting to make one of these for a while. Not from a specific movie or show, but very much something you would expect to see in one. Going to try and go for a small C-4 bomb with electronic detonation unit / timer.
an example of real plastic explosive (C-4):
for the C-4 i discovered that polymer clay from the craft store is a perfect thing. I got some 1lb blocks, they color is "ivory" to best mimic the off-white of C-4. without having handled any in real life, this seems as close as I would hope to get
i'm going to try and press these into a flat sided shape for the final unit.
as far as the timer / detonator unit, i haven't decided on a final design. i know i can picture lots of movie bombs in my head but i cant remember anything specific and not much turns up in a web search.
this is a pretty interesting looking design, that has a lot of the features i plan to use.