If they disagree, they'll step backward. For review, write questions, one to an index card, as well as answers to the questions, one to a card. Lay cards face down in a single layer on the table. Each child gets a turn to pick up two cards. If the question and answer match, the child may keep the cards, otherwise they're placed back on the table face down.
Every child gets a turn to match cards until all the cards are matched.
The last part of each session is devoted to helping children apply God's Word to their lives. Take a field trip outside of the classroom, visit a nursing home, or construct cards or gift baskets for shut-ins. Set a goal that involves hands-on activity and work toward it. For example, your class might aim for collecting a specified amount of money for a special cause. That could involve making posters to let the congregation know about the project, and planning activities to raise funds consider doing yardwork or other projects for members of the congregation.