This sounds similar to Montessori. The Montessori schools have fostered many entrepreneurs.

I've found the same thing. It's a good way of keeping kids thinking while having fun. Furthermore I think it builds confidence in their own way of thinking and a natural scepticism to new information. Is the world playing tricks with me again or is it valid information?

I would buy lots of childrens books and read aloud when possible. If you can make reading a natural activity your kid will benefit greatly later on.

Danish citizens which is only allowed to be done by the police. And withholding of information to be reported.

Is it related to that Iranian kidnapping plot that led to Denmark being shut down for a while the other year? (Only because it's the most dramatic thing to happen there in a bunch of years, that would be related to the intelligence service.)

The grounds of accusation are kept secret as it is based on confidential information.

Leonardo da Vinci means Leonardo from Vinci. Trivia is not always useful but is an indicator of curiosity.

Strange nobody mentions the value of domain knowledge. My opinion is that there's little difference between young and old developers, but a difference in their domain knowledge. Valued software developers understand not only software but also their problem domain.