Do It Forever!
One thing kids never get bored of is watching the same thing over and over again. In fact, you can try anything with them like a new game, a bedtime story, or a funny face, and they would ask you to do it a hundred times more.
This comic is an ideal depiction of what it feels like when your kid is asking you to repeat something you did because you thought it would make them laugh. The first couple of times are cute and you are happy that your kid liked your trick or whatever but not so much after that.