The popular KBS 2 TV entertainment program 'Superman Returns' Lee Hwi Jae's twin son Lee Suh Joon is now potty trained.

On the upcoming episode of the popular KBS 2 TV entertainment program 'The Return of the Superman,' which will air on Dec. 27, 2015, Lee Hwi Jae babysat his twin sons Lee Suh Uhn and Lee Suh Joon. On this day's episode, Lee Hwi Jae brought a baby toilet and asked Lee Suh Uhn to use it. Lee Hwi Jae successfully potty trained Suh Uhn and felt proud. In related news, the KBS 2 TV entertainment program 'Superman Returns' tells a story of Korean celebrity dads and their children. Actor Song Il Gook and his triplets Song Dae Han, Song Min Gook, and Song Man Sae, MMA fighter Choo Sung Hoon and Japanese top model Yano Shiho's daughter Choo Sarang and comedian Lee Hwi Jae and his twin sons Lee Suh Joon and Lee Suh Uhn star in the show. The KBS 2 TV entertainment program 'Superman Returns' airs every Sunday night.