I agree with you, and I congratulate you for the decision to play with your children assembling the legos, that is something priceless, that moment of relaxation and enjoyment while they assemble it is the best, I do not have boys, but you can not imagine the times I played doll with my daughters or they played imagining they were hairdressers and combed my hair or put ornaments in my hair, see them and hear them laugh at me is priceless.
Good for you and your children,
Besides, you can't deny that putting together legos is fun, I love it.
!BBH