What is this toy called?

Hi, so on snapchat I saw this toy and really wanted to know what it was. I asked the person who uploaded the snap that it was from a Korean Drama called "legend of the blue sea" so if you K drama experts have any idea what it is and where I can get one, I will highly appreciate it. https://gyazo.com/5cfaa2558bcd1da37e57f2526fd300c9
The link above is the img Thank you!