Here is Dede preaching the gospel to a bunch of kids. I've heard from one person, what is the point? since these kids are mocking God's Word and appear to care less and my response is this. The preaching of the cross is foolishness to those who are perishing but to us who are being saved, it is the power of God unto salvation.
"How then will they call on Him in whom they have not believed? How will they believe in Him whom they have not heard? And how will they hear without a preacher? How will they preach unless they are sent? Just as it is written, "HOW BEAUTIFUL ARE THE FEET OF THOSE WHO BRING GOOD NEWS OF GOOD THINGS!" However, they did not all heed the good news; for Isaiah says, "LORD, WHO HAS BELIEVED OUR REPORT?" So faith comes from hearing, and hearing by the word of Christ." (Romans 10:14-17 NASB)
These kids were not the only ones listening. There were others listening and even Christians were standing by or sitting around and when the preaching was over they would come up and thank us for what we were doing and we would encourage them to step out of their comfort zone and share the Good News with someone.
Don't quit. Dede didn't quit as she went through the law and the gospel with kids. In the end, we don't know what will happen to those kids. God holds every soul in His hands. Not one of His children will perish. The gates of hell will not prevail against the will of God. God's Word accomplishes what pleases Him for His glory.