Same here when I was about 7 years old he had me doing reams of algebraic problems, he the built a small morse code system so we could communicate in morse code from one part of the house to another and often would come home slightly tipsy should I say drag me out of bed a 2 or 3 in the morning and insist on playing chess till dawn. I must admit to having a strange if not a little stressful childhood He was always building radio gear in the front room also wires strung every where.