Hwijae takes Seoeon and Seojun to World Insect Fair as well as Folk Village to have a good time. Donggook’s children spend a day with star uncles while Donggook is out for work. William’s grandmother comes to visit Sam’s family from Australia, and goes on a Seoul tour with them. Seungjae learns how to be a big brother by playing with his little cousin. Guest stars: Kang Daniel, Ong Seong-wu, Park Ji-hoon, and Yoon Ji-sung From Wanna One (Source: Wikipedia)