C is for Car.  A  simple and sweet little car can be made with a small oval, representing the windshield,  placed over a larger oval.  Two small black circles make tires completing the car.  

Really, anything can be represented using Euclidian solids and lines.  For example, you or your children may choose to make a cat:

An inverted triangle makes a perfect carrot:

What other ideas can you think of to create for your C page?  Leave a comment!