The Taste Buddies are putting on a play where they'll need to make pucker faces, so the Taste Buds are on the hunt for foods to sour their smiles! Avery learns how to make pork pot stickers with sour rice vinegar sauce. Lily's off to a pickle factory to discover how a cucumber becomes a pickle. It's double the shivers when it's time to make ice pops with Matt - super sour ice pops.