My dad is a hibee, I support Aberdeen, my oldest daughter was a mascot at the CL game between Celtic & Barcelona thanks to her dad ( she now likes the dons cause she is at uni up there)
You can steer your kids in the right direction (depsite my ex having a Celtic season ticket my youngest daughter likes the dons too cause she has been to games with me and not him)
But ultimately you have to let them support their own team - the nicest thing my dad ever did for me was to take me to Pittodrie as a kid when Easter Road was a bus journey away from us
Good Luck