When your kids see you assuming certain household responsibilities -- say, you do all of the laundry and your partner does the gardening -- they naturally and automatically assume that this is the way it is across the board and around the world. "The information you gather as a child is what we call tacit knowledge, and it basically forms the assumptions you take with you into the rest of your life," explains Siegel. Want to raise kids who not just value but expect teamwork? Let them see you folding laundry or pulling weeds together. Bonus: They're more likely to pitch in themselves when they don't view a task as strictly mom's or dad's domain.