I used about 12 small magnets sewn into pillow sized sheet which I use to sleep on. It was specifically purchased for magnet therapy. You can easily buy the small magnets and put then in your pillow case. It works for me and I know my dad complained of dreaming all the time when he used it. But not sure if it will work for everyone but I'm interested to find out.

I doubt they help making the dreams lucid but if they may help to make you dream everynight maybe more chance of getting a lucid one?!