Jello vs. Jelly

A few days ago I bought some chocolate Jello pudding packs. If you know my kids - they love anything chocolate. So of course Alex was asking if he could have some right there in the store. So I told him if he was really good in the store and on the way home I would give him some when we got home. So as soon as we walk though the door he turns to me and says "Mom, I been good. I want Jelly." So everyday since I hear "Mom, I been good. I want Jelly."