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Their father Song Il Kook made the boat from scratch all by himself, and he took the triplets out on the ride during the recording for the upcoming episode! 

Well, actually, the boat was supposed to be a joint project between the triplets and their father, but you know how these triplets can get! Despite their father coaxing them into the project by telling them that they'll be making a 'prince boat', Dae Han soon lost interest, Min Guk asked his father to take him to the bathroom during the crucial production stage, and Man Se kept wailing for his Tyrannosaurus. 

Song Il Kook was left alone to finish the boat in time for the race, but how did it turn out? You'll have to tune in on Sunday to see!