I asked each student to come up and tape their paper "bricks" to the board. As they did that, I had them share with us what they wrote as they contructed our "testimony wall". I adapted this activity from another teacher and decided to try it. When I incorporated this into my lesson, I kept thinking that this activity was too childish for my juniors and seniors. They're beyond this elementary school stuff. I thought they might have felt silly doing it. I pushed through my doubts and continued. As they brought up their "bricks", I could see who had a testimony of what. I loved seeing that. Some of the "bricks" they brought to the board were: God lives, tithing, daily scripture study, the power of the Priesthood, prayer, modesty, the Atonement, service, attending church, the Holy Ghost is real, etc.
In Helaman 13-15, Samuel the Lamanite had the confidence of the Lord behind him to boldly stand on this wall in Zarahemla. The Spirit of the Lord protected him as he called the Nephites to repentance. There was nothing the Nephites could throw or shoot at him that would deter him from accomplishing what he was sent to do. Samuel's testimony was based on the foundation of Christ, making Samuel "steadfast and immovable". My interactive object lesson was designed to show them what their "testimony wall" consists of and how to maintain it.