The key is that it is executed with, and a part of, the original contract. Sometimes agents confuse addendum with an amendment, which is a modification later to the terms of an already-accepted contract. It has surprised me how often experienced agents use the wrong term for a document.
At this time, wax crayons were big, dull-colored, and clumsy and were used mainly in industry. But Binney & Smith used a combination of paraffin wax and industrial pigments to create crayons that were kid-friendly. In 1903, the first yellow and green box of eight Crayola crayons appeared. (The name Crayola means oily chalk).
You can also use the paper liners instead of spray cooking oil, and the paper will peel off after it cools. Place the muffin tin in a 200 degree oven for about 10 mintues, or until all the wax melts. It is facinating to see how the crayons melt and mix together. Have a discussion about the melting process.