Sure, you can buy Rice Krispies or something similar - but making your own puffed rice at home is not too difficult, and is much healthier! This techinque works with any starch. Fully cook your rice, and then dry it out (it usually needs about 24 hours to dry completely). Then take an oil with a high smoke point (such as canola oil) and heat it in a wok. Pour your rice into a strainer, and then submerge in the oil for a few seconds.