You may not find this a particularly satisfying perspective, but sometimes it’s good to go a step at a time. Celebrate the soldering gun in the daughter’s hands (!), and don’t fret too much if cultural change doesn’t happen in one big leap.
Everyone, perhaps, except his daughter, who may really like the decorating aspect of the project!
In raising my children I was always very careful – even while explaining to them what I thought was right and wrong – not to impose constraints on what they should like. If pink was my son’s favorite color, great! (which you probably agree with). If pink was my daughter’s favorite color, that was great too! (which may give you pause)
Thankfully they both outgrew pink (which made laundry complicated). But that outgrowth was natural, not directed.