* An IR LED, maybe from an old tv remote.
* Two AA Batteries, most LED run on 3v
* Momentary button, go harvest
form that old radio you have or something* Chassi (something to make it a "pointer", so you can actually point with it.
Kind of optional
* Soldering Iron
* Flux!!! (if
your soldering, this is key to everything!)
Really, you should use these, but you can tape it together, kinda
getto, but will work, atleast temporarily.
Now connect the stuff together
| # <- button, you can put it on