One of the ways to develop comic talent is to practice different scenarios. Versatility is a mark for success in the industry. The person has to adapt into as many character roles as there are parts. One does not have to confine oneself because of an age bracket. Many comedians started out as adults and fulfilled a character role that became very successful as people became accustomed to their repertoire. Thus Jackie Gleason invented characters like the bartender or a bus driver that were successful because of their positive appeal.
Doing a skit can just mean doing a solo act or it can entail a role-play between two or more people. There can be multiple scenes between two or more people to develop the skit into a shot comical story. People can think of doing a satire or parody by thinking of a political event they would like to make fun of or politicians they would like to mimic. One might even throw in an accent or dress wildly to add another dimension to the comedy. The idea is to have fun while you are creating your story.
One idea might lead to another, as in the case of doing a comic interview between two contrasting individuals, like an eccentric artist and a psychiatrist. One can think of countless human foibles to be able to draw some inspiration as in a situation involving the current house market. As long as the writer does not limit himself by following a predetermined scheme he should be able to think outside the box and come up with new and exiting material.