Karate and the dip: Two most important knowledge for sons

This will help them in all areas of life. Karate is to create power to deal with difficult situations, it grounds them. The dip is to understand take smaller short term pain instead of much bigger long term pain.

The other smaller two knowlegde: Poker... is knowing that bluffing is prevalent in all people interaction, and how to counter bluff. Oracle is the biggest toy and the you make money playing with it.