ンゴコッコタッチ
The invitation you used to invite your sons to the movie is not appropriate as it is not clear and may confuse them. It's important to use clear and understandable language when communicating with others.
A more appropriate invitation could be, "Hey, I want to take you both to a movie today called Kyukyun's Ngakkokko Touch. Are you guys interested in watching it with me?" This invitation is clear and easy to understand, and allows your sons to respond with their own thoughts and feelings about the movie.