Toot by Andre LouisAndre Louis (universeodon.com)

Jelly, or at least the spreadable kind you're thinking of, is made with fruit juice, and so the consistency is a little smoother and it's a little easier to spread. Jello is fruit-flavored jelitan, which comes from a pig, and usually comes in a box and you add water and you can pour it into a mold. It really will stick to the wall if you throw it.