At a Mass for Children, I think there is more leeway, and it would be allowed, particularly if he is the author of the skits. Even though it normally ought to be the clergy, and not the laity, who write homilies, a priest who does not have a good ability to relate to children might rightly enlist the aid of someone, like a teacher, who is skilled in that area, even to the point of having the teacher write the skits. That is allowed because sometimes it is the best solution.
That doesn’t mean it is out of place to tell Father that the skits bother you, that you like his homilies on Sunday much better. You might not be alone, after all. At any rate, if he knows the practice is not universally edifying, he may decide to do it a little less often. Do be very respectful, though.
