More weekend fun to help kids enjoy the wonders of Science and learn more about chemical reactions! Here are 5 science experiments that pop, sizzle and bang!
Most of us would have done this experiment before using baking soda and vinegar. As kids, we would have even build a replica of a volcano that surrounded and covered the container in the middle.
First, mix water and baking soda together in a container. For colour, add in food colouring or washable paint. To get it to erupt, pour vinegar into the container until it starts foaming and fizzing.
To put a fun twist for kids, have them experiment with different types and shapes of containers. They’ll find that a bottle with a narrower opening will give a better fizz.
Other than that, have them experiment with different water ratios. The more water is used, the bigger the fizz! You can also help them heat up the vinegar so they can see for themselves how pressure affects the fizziness of the liquids.
2. Ice volcano
Ice volcano is a variation of the usual volcano experiment. For this, you can make a volcano mound and freeze it. To make the mound, place a golf ball in a small bowl.
Next, fill the bowl with a mixture of water and baking soda. You can add in food colouring or washable paint to give it some colour. Make sure to pour until it covers the golf ball because you don’t want an incomplete mound. Once done, freeze it!
To make it interesting, have kids make a mound using gravel outside and bury the frozen mound in it. To get it to erupt, pour vinegar into the frozen mound!
3. Exploding chalk art
To make the chalk mixture, you need lots of Ziplock bags, corn starch, vinegar, food colouring or washable paint and baking soda. Make square pieces of baking soda by wrapping a small amount with paper towels.
Fill the bag at least 1/3 of the way with the liquid chalk mixture but leave the baking soda out. The key to making a bigger explosion is to have fuller bags.
To get the fun started, quickly toss a baking soda square in the bag and quickly seal it up. Then leave it on the roadside, give it a good shake and stand back to watch it POP! The bag will get bigger and bigger which will excite kids.
Line up a few bags together to create interesting patterns and colours. Make sure to wash off the paint from the roadside. You don’t want to anger the neighbours!
4. Elephant toothpaste
In this experiment, you’ll need yeast, 3- 6% hydrogen peroxide, plastic glitter, food colouring or liquid watercolour and dish soap (with no Triclosan/ antibacterial).
First, let the kids mix 1 teaspoon of yeast with 2 tablespoons of warm water and stir it well. Try to stir until there are no yeast clumps.
Prepare the peroxide solution in a bottle. For the peroxide, it’s better for an adult to mix it in but let the kids squeeze in a few drops of dish soap, food colouring or liquid watercolour and the plastic glitter.
When it’s ready, place the bottle in a tray to contain the mess and pour in the yeast mixture. Remove the funnel when it starts foaming. The foam now is safe to touch because by then the peroxide will have broken down.
5. Lava lamp
For something milder, it’s time to make a lava lamp! It doesn’t make a single sound but the blobs floating up and down intrigues kids.
For this, you’ll need a glass bottle or a jar, alka-seltzer tablets, food colouring and vegetable oil. Fill the bottle halfway with vegetable oil and add ¼ more with water. Then add 5 -6 drops of food colouring before dropping an alka-seltzer tablet into the bottle for it to start forming floating blobs.
If the blobs disappear, add in another tablet to get it going again. The bottles can be filled with water and covered with a lid to act as a shake bottle.