Use a box flap To make the turret roof. This is a great way to recycle. Mark a dot in the center of the cardboard at the edge. This will be the turret roof center. Which is also the point at the top of the turret. Measure out from that dot 4-1/2". The easiest way to do this is with a compass. Make a 4-1/2" half circle around that center dot.
I'm a maker and a thinker. I live in a magical world inside my head. To some, I am an artist. I am surely creative. And my creations change as quickly as my mood - so you never know what you're going to get.