Kitchen Chemistry for Families
Four famous kitchen experiments, done properly: a homemade lava lamp, oobleck, a baking soda volcano and invisible ink. Each one starts with a real question, works with things from your cupboard, and leaves your child able to explain what happened.
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4 lessons in this unit
Lesson 1 · 45 minWhy do the blobs in a lava lamp go up and down?Kids layer oil and water in a glass, add food colouring and a piece of fizzy tablet, and watch coloured blobs rise and sink. Then they explain it with floating, sinking and gas bubbles, and test whether warm water changes the show.
Lesson 2 · 45 minIs oobleck a solid or a liquid?Kids mix cornstarch and water into oobleck, then poke, squeeze, slap and drip it to find out when it acts like a solid and when it acts like a liquid. They finish able to explain why speed and force change the way it behaves.
Lesson 3 · 45 minWhat makes a volcano erupt?Kids test baking soda and vinegar to find out where the fizz comes from, build the classic kitchen volcano, then open bottles of sparkling water to see what really drives an eruption: gas trapped under pressure. They finish able to explain how the model is like a real volcano, and how it isn't.
Lesson 4 · 45–60 minHow do spies write secret messages?Kids write invisible messages in baking soda, then reveal them by painting on grape juice or turmeric water, which change colour where the baking soda is. They finish able to explain that acids and bases make some colours change, and why a plain-water message stays hidden.
These four lessons take experiments you have probably seen online and turn them into real science at your kitchen table. Your children build a lava lamp and find out why the blobs rise and fall, squeeze oobleck until it can’t decide if it’s a solid or a liquid, make a volcano and then discover what really drives an eruption, and write secret messages that only appear with grape juice. Each lesson takes about 45 minutes, uses things you can find at the grocery or dollar store, and tells you plainly what usually happens and what to do when it doesn’t.
You don’t need a science background. Every lesson gives you a short story to read aloud, steps you can follow without rereading, the science in plain words, and honest answers to the questions kids actually ask. By the end, your children can explain floating and sinking, how a new gas can come from mixing two things, and how acids and bases change colours. Anything hot or harsh is a grown-up’s job, and every lesson says so right in the steps.