This interactive alphabet notebook is perfect for teaching the alphabet to children. Children will make a craft for each letter, write their letters, and cut and paste different pictures that match the letter.
Teaching 5th grade the last 4 years, we went back and forth on that silly cone and cylinder too. How many edges do they really have? Glad to see someone else is just as confused as I. (By the way, it's all in the wording of your definition of edge.)