In my home, I have a coin. I can use that coin to generate random bits. These bits are mostly secure unless someone is watching me flip it. They're also only random-ish... maybe I'm a "bad flipper"?
I also have a computer. I can use it to generate bits that are sort of random, but not really. These are secure if you trust the algorithm and the machine. /shrug
I'd like to generate random numbers with the materials I have at hand, and for them to be secure. Can I do better than a coin flip in terms of security or randomness?