Show your child "Feminist cringe compilations" and get him to laugh at the silly crazy women who say stupid shit. Talk to him and help him gradually understand why these silly crazy stupid adults seem like they believe such blatantly false things. Don't be afraid to say "they don't really believe their lies, they just think pretending to believe them will help them trick dumb people" because that's true. I don't know how old he is but introduce him to Jordan Peterson videos. After your kid knows he can laugh at the crazies and understands all the dishonest tricks and "muh equality!" lie, teach him how to hide his power level. And tell him how the system is designed to fuck men over and preach anti-white bullshit. Basically, teach him to think critically and teach him it's okay to ask you for help and take a while to understand the convoluted layers of doublethink.

Feminism is a lie told by evil power-hungry criminals.