You shouldn't make a kid an engineer or whatever because you think it would be a good profession. You should try to find out what your kid likes, what he/she is good at and support that.
Yes, exactly, and even less based on what someone's sex is, just let people do what they like to do and are good at and support that.
It's easy to learn programming today, everyone has a computer and the internet, which is all you need if you have the will (search the web for tutorials on html and javascript -- everyone already have the software necessary: a web browser and a text editor).
It's different with other crafts though, like electronics and chemistry. For that you need special gear, you need to know what to buy, and you need components and a breadboard and some way to make circuit boards and maybe a good book (like AoE) and basic mathematics skills (and $$$). The prerequisites for learning electronics are just a lot higher than for programming unfortunately. So in that case, a mentor that can help you out would make a huge difference (whether you're a boy or a girl).
The same is true for chemistry which is almost impossible to learn or as a hobbyist nowadays. My dad's a chemist and he used to have his own lab where he did experiments as a kid. Today that would be impossible, if you managed to buy any chemicals you would have cops knocking down your door within weeks because some neighbour think you're making drugs or planning a terrorist attack.