Drew Cohen, left, hands a copy of Jonathan and Drew Scott’s new children’s book "Builder Brothers Big Plans" to Sia Mozaffarimehr during a book signing at Discovery Children’s Museum on …

Drew Cohen, left, hands a copy of Jonathan and Drew Scott’s new children’s book "Builder Brothers Big Plans" to Sia Mozaffarimehr during a book signing at Discovery Children’s Museum on Monday, Oct. 8, 2018, in Las Vegas. Benjamin Hager Las Vegas Review-Journal @benjaminhphoto