Flux Capacitor - Small Model
This is a working flux capacitor. Not in the sense that it will propel your Delorian through time, but in that it lights up and looks like the one used in the movie, but a bit smaller. Runs on a USB power cord which can be attached to a battery.
Turn your car into a time machine or just add it to a shelf of a movie nerd that idolizes Back To The Future and believes it is real.