There are some good books to gently introduce feminist role models such as Fantastic Women Who Changed The World which my 6 year old loves.
Celebrate women - be excited about spending time with female family members, have fun with your children, have great friends of your own and a social life and interests outside the home. Model a loving and mutually supportive relationship. Gently introduce the idea that "equal" doesn't mean "the same" - you have equal Christmas presents, but you each get to choose your own.
Listen to them and make them feel valued. Do not let them hear you belittle others - especially women, especially not for appearance or how many partners they have had.
Reference female sportspeople and musicians. Ask rhetorical questions; "Why is Skye the only female Paw Patrol?" Buy comfortable clothes for them and you, buy a mixture of toys from Lego to cars to dolls.
Let them hear you get angry about issues - talk about real things at dinnertime - the letter you wrote to your MP or the way you shot down a builder who catcalled you, in an age appropriate way of course.
Respect their boundaries and do not make them hug or kiss people they don't want to.
When people say "All those girls? Poor you!" or similar, look baffled and say "No, lucky me."
Model happiness, kindness and a "mucking in" attitude and the rest will follow.
I am a SAHM and a feminist and I do not believe they are mutually exclusive. My worth is not determined by £££ on a payslip.