You may remember hearing about curds and whey from the old nursery rhyme about Little Miss Muffet. Well, this kitchen science experiment will teach you what curds and whey are, and you’ll even make some yourself! Curds and whey are a product of cheesemaking! Milk is made up of proteins, sugars, fat, minerals, vitamins, and enzymes. When you add an acid like lemon juice to warm milk, it causes molecules of one of the proteins in milk to bond to one another. That forms a solid lump of protein which is also known as a cheese curd (the leftover liquid is called whey.) You can eat cheese curds on their own (they taste like ricotta cheese) or top with honey or fruit for an awesome treat.