First of all make clear that this post is a round pot
Specifically it is about creating the rules of a giant steam tank course.
And you will wonder … how is a giant steam tank?
More or less a giant steam tank would be a small fortress errant metal and stone walls with a gun salute with cannons echo imperial or a giant mortar.
I would note that this miniature not be used in battle, or to create a monster to destroy impossible to subdue the enemy. Special items would be used in multiplayer where various factions would try to steal a treasure, and the player’s tank should try to repel them, even you could create a reaction table for the tank to act independently, making the games more unpredictable and fun.
Encourage them to participate, with a profile of attributes, rules, board reaction, etc…