Blend
flour, eggs, pumpkin, peanut butter, salt, and cinnamon in a
large bowl. Add water as necessary to help make the dough
workable. Your dough should be dry and stiff. Roll your
dough into a 1/2-inch-thick roll. Cut into 1/2-inch pieces.
Bake in a
preheated oven until hard which should take about 40
minutes.