hi i did a lot of research into lucidity, and its basically possible because the brain acts like a very very complex VR computer, it uses several devices such as memory, imagination, emotion and 3D to convince you that what you are experiencing is real or as we all know it dreams, dreams are basically the same as watching a badly cut video, but with a lot more besides, the brain invokes most of your senses such as fear, touch, hearing, touch and sight to create a believable experience, this can be controlled but only with a lot of experience, there are devices available two that i have had experienve of are 'the novadreamer' and 'the mindlab' both work very well, altho the mindlab worked better, they both work by flashing LED lights in a pattern that is supposed to interact with the brains alpha beta gamma and theta waves, the novadreamer is more for lucidity, while the mindlab is more for exploring the brains potential while awake, had a really freaky experience with the mindlab, however the novadreamer worked twice, trouble is its like a sleep mask and i move around alot in my sleep, so i'd find it at the bottom of the bed most mornings, anyway basically these are devices that work on flashing lights, the nova dreamer has a sensor that detects motion so when you hit rem it starts flasshing LED lights which give you a cue in the dream that you are dreaming, and your supposed to then be able to control your dreams, the price tag is heavy i was in the UK at the time and it cost me 250 english pounds, im sure you could build one for about $40, hope this helps a little, it is worth learning to be lucid as the learning applications it has are amazing, not to mention the fun you could have re-enacting the matrix. Michhael