I learned three things today, three little lessons in life.
Homemade ice cream will NOT freeze without rock salt, no matter how much ice you use and how long you let it turn.
Never assume that you have what you need for a project. Do not assume that the rock salt is in the garage; you must take the time to go look in the garage to make sure that you have everything that you will need to complete the project.
You must keep your house and garage organized if you are ever to find anything that you think you have. You can not expect to be able to easily find the rock salt if you are so unorganized that nothing is where it should be.