How do you build a scale model of the Colosseum with marshmallos and toothpicks?

To build a scale model of the Colosseum using marshmallows and toothpicks, start by creating a circular base with toothpicks to outline the outer wall. Use marshmallows as joints to connect the toothpicks vertically to form the arches and tiers of the structure. Continue to layer the marshmallows and toothpicks to represent the different levels, ensuring to mimic the Colosseum's iconic arches. Finally, add details like the inner arena and seating areas with additional marshmallows and toothpicks for a more accurate representation.