We don't homeschool yet because the elementary school they attend is pretty decent at this time. We do supplement their schoolwork with "home extra credit" of our own: Reading, writing, math. I am teaching my kids, six and eight, to operate a metal lathe and milling machine. We also make rockets from scratch, including the solid rocket motors.
My brother, he's 52 now, made rockets as a kid. One time, he smoked the house, some chemicals that didn't work. My mom came running out of the shower naked. eeewwww!