I happen to be the builder in our family. My husband is useless for such things. He does the dishes and laundry. I refinish the furniture, build the bookshelves from scratch, and mow the lawn. He lays the sod, I do the breastfeeding. He kills the bugs and takes out the lizards, I paint the rooms and claim all the tools in the garage as my own. Yin and yang. None of those things require any special male or female characteristics, so I see no reason to put labels on them such as "man chores" or "woman's work."
You want kids' brains to get fat? Stop limiting and relegating them based on their genitalia.
As it is, you've lost a potential customer. My son and I, ever on the lookout for projects to do together, are off to look elsewhere. Have fun building with your penises.
Sincerely,
Amy the Toolwoman Mama