I have used fibre optics many times in the past. The kits are a great starting point if you want it ready built. If you can use a soldering iron and prepared to do a little work there are many effects possible. Any bright LED powered up with a bunch of fibre optics held on the bulb with heat shrink works well with min fuss. I used flicker LEDs Blue/Red fed through my battle damaged neca T800. He lost his legs and these served as the wires that were still powered while the poor t800 slowly wilted.... eBay is great for all sorts LEDs, flicker, flash, multi coloured.
Good luck.
Snaz