This Halloween spider web activity for kids has some good Graph Theory and Geometry stuff! You can talk about the number of holes (vertices), how many times you go across (edges). And if your child decides to double up, what consequences does that have for the connections! ~Bon
The Corn Palace is covered in murals created with naturally colored corn, grains, and grasses. There are 13 different colored corns used! Each year the murals are torn down and replaced with fresh new designs.