The kitchen's not just for cooking. Here are 9 science experiments you can do there

Did you know that there are dozens of science experiments just waiting for you to explore, right inside your own kitchen? We've created a list of some of the coolest things you can do with stuff you already have. About half of the list includes edible options too.
Try out a few of these experiments and show your little ones just how cool science can be.
1. Fizzing rocks (h/t Science Sparks)
This experiment is fun because it shows how a chemical reaction can break down a solid object. A mixture of baking soda and water dries into a hard material. Putting vinegar on the hardened rocks, however, breaks down the baking soda, completely destroying the rock in just a few minutes. Try adding small amounts of vinegar to see the reaction occur at a slower rate.
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2. Popcorn on a cob (h/t Tinkerlab)
When you put popcorn kernels on the stove with a little oil, the heat turns a tiny droplet of water inside the kernel into steam. The resulting pressure explodes and voila! Popcorn. Surprisingly, dried popcorn on the cob pops too.
3. Make edible water bubbles (h/t Inhabit)
Labs have been working on ways to create edible water bottles. When accomplished, this would significantly reduce waste. The process is called spherification. The combination of calcium chloride, sodium alginate and a liquid causes the fluid to become sticky and form a membrane. This technique is also used in high-end cooking.
4. Make rock candy (h/t Happiness Homemade)
This fun experiment takes a lot of patience, but you'll be able to see (and taste) what happens when water and sugar particles stick to a solid (a skewer). The resulting crystallization occurs as the water slowly evaporates, drawing sugar molecules onto the skewer.
5. Glowing gelatin (h/t Instructables)
This reaction works because quinine (an ingredient in tonic water) is fluorescent, which means it absorbs ultraviolet light and then re-emits it. This allows the gelatin mixture to glow if you substitute tonic water for regular water in the recipe. For best results use a lighter-colored gelatin. (A bonus: You can eat it!)
6. Make invisible ink (h/t Sick Science!)
You can use onion juice, lemon juice, vinegar, white wine, milk or even sugar water to create an invisible ink. When heat is applied to the "ink," the paper surrounding the substance you used gets hot first, revealing the message. In some cases, the invisible ink reappears after the heat application breaks down compounds and releases carbon. ​
7. Fireworks in a glass (h/t Go Science Girls)
This experiment shows how density affects things. Because oil is less dense than water, it floats on top. The food coloring (water-based) helps break the oil into smaller molecules. These molecules become suspended in the food coloring, giving you a fun display to watch.
8. Make ice cream (h/t Kidz World)
Science can sure be tasty. This experiment shows how salt molecules affect ice. Salt makes a water's freezing point drop. (That's why people salt their sidewalks in the winter.) In this activity, the salt mixture helps change the milk and cream into a solid. This process takes a while, but it's seriously yummy, so keep churning until it turns into ice cream.
9. Make milk paint (h/t Modern Parents Messy Kids)
When you add dish soap to the surface of a milk and paint mixture, the soap breaks the surface and causes the paint and milk to pull away. (This is why dish soap works so well for cleaning dishes). Try using different types of milk and soap to see which has the best reaction.
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