Step 1: The materials
1. 2 cardboard boxes (for the sides and the towers)
2. 1 or 2 thinner boxes (for the accesories like the spikes, arched walls, and the round tops)
3. A thing to cut the boxes with like a knife of scissors*
4. Lots of tape or glue
*be very careful with the cutting item. I would recommend wearing gloves for this.