Thank you for the link Eric.
I might be wrong, but in the link you posted, it seems like you would place your finger over two contacts (touch probes) next to each other, and it would sense the difference?
What im actually trying to do is have it so there is a lump of aluminium, and touching the block will trigger the LED. So really I only want one touch probe, which is in my case the entire lump of aluminium.
Could your posted circuit work in that situation? I also found this on the same site, this might be a bit more applicable to me, since it only has one touch probe?:
Simple Touch Switch Using 555 IC | Free Circuit Diagram
Also, is aluminium a suitably good electrical conductor to work for this kind of touch switch?