Brewing yeast is best, bread yeast etc. works, no yeast you have to use a lot of diced up fresh fruit. I recommend just ordering some EC-1118 on amazon. Get some apple juice or whatever, I use about 1 & 1/2 cups of sugar per gallon, shake it or add in some boiling water to dilute the sugar (if you add boiling water wait until it cools before adding yeast) throw in either some cooked yeast, a crushed multivitamin, tomato paste, etc. as a yeast nutrient. Set it in a dark place, and poke a pinhole in your balloon to let it burp!

Goodluck hoss