Korean help needed please? How to write short message to niece & nephew?

Hi. I'm sending a short video message to my niece and nephew, ages 6 and 8 (real age not weird Korean age). I would like it be something like, how are you, I want to see you, I miss you, I love you, study hard, etc. What do Koreans say to young kids? Can you respond with a short message in Korean? Thanks!

It is difficult to offer you much help given the lack of background and purpose of your message. If it is just a friendly video to drop a "hello", this is what I would say:

靷瀾頃橂姅 齑堨勾霌れ晞!
攴鸽彊鞎?鞛?歆€雰堧媹?
雱堩潿霌れ澊 攴鸽甑?氤搓碃鞁蛾惮雮?
鞐勲 鞎勲範 毵愳攢 鞛?霌ｊ碃 頃欔祼鞐愳劀 瓿惦秬 鞐挫嫭頌?頃橁父 氚旊瀫雼?
雼れ潓鞐?毵岆偁霑岅箤歆€ 瓯搓皶頃橁矊 歆€雮措澕.
靷瀾頃滊嫟!

鞎堧厱!
鞛橃雮措媹?
氤搓碃鞁峨嫟...
瓿惦秬 鞐挫嫭鞚错晿瓿?.
靷瀾頃?!
haha and just add whatever stuff you need. also depends on how old they are.,,

hi = 鞎堧厱
how are you? = 鞛?歆€雮措媹?
I want to see you = 氤搓碃鞁峨嫟
I miss you = 氤搓碃鞁峨嫟 (the same with "I want to see you")
literal translation would be "雱堩潿霌れ澊 攴鸽甑倶."
I love you = 靷瀾頃?br> study hard! = 瓿惦秬 鞐挫嫭頌?頃橁碃!!

FYI, either nephew or niece is '臁办勾' in Korean.
You can put
"Love, Aunt" 靷瀾頃橂姅 鞚措臧€ (if they are your sister's kids)
靷瀾頃橂姅 瓿犽臧€ (if they are your brother's kids)
"Love, Uncle" 靷瀾頃橂姅 靷检磳鞚?br>
Hope these help.

p.s. "鞐挫嫭頌?quot; is correct, not "鞐挫嫭鞚?quot;

鞎堧厱, = hi
鞛橃雮挫? = how are you
毵庫澊 氤搓碃鞁嫟! = both i want to see you, I miss you
靷瀾頃?= I love you
瓿惦秬鞛橅晿瓿? study hard
瓯搓皶頃橁碃 = stay healthy
鞛橃雮? sort of goodbye have a great day kinda thing
雼れ潓鞐?氤挫瀽= see you later
these are just short phrases
if I were to make this into a message and make it flow:

_____(nephew, niece) 鞐愱矊,
鞎堧厱,
鞛橃雮挫?
*鞚措 or *瓿犽鞎?
雱堩潿霌?毵庫澊氤搓碃鞁嫟
瓿惦秬鞛橅晿瓿?鞛橃雮?br> 雼れ潓鞐?氤挫瀽
靷瀾頃?br> 鞚措 or 瓿犽 臧€

*鞚措(aunt for mom's side ) or *瓿犽(aunt for dad's side)