Group WINNER had childish fun as they had an exchange experience with dolphins.

On "WINNER's SUMMER VACATION" aired on the portal website Naver V App on Friday, WINNER visited a dolphin exchange site in Jeju Island.

The members had the chance to kiss dolphin Hwasoon and send her messages through hand signs. The members said, "This is so fun. I'm so happy," clapping and laughing like little kids.

WINNER and iKON will be airing a total of five episodes of "SUMMER VACATION," beginning with today's episode.