I used to be a scientist, you know. And in my time I've done a fair amount of manipulation of genetic material (and not just my own!)
So I was naturally drawn towards gene sequencer, a fairly-fun little web game that's programmed out of that flashy stuff. I tell you, molecular genetics was just like this in real life. But with better music.
And as a gift from Uncle Starbuck to celebrate the rapid approachment of a much-needed weekend, I shall point you in the direction of the self-same coder's Connect 4 game. A good way of wiling away a few slack moments.