If you’re looking for a simple kids’ science experiment with a BIG wow factor, you’ve come to the right spot! This science experiment uses just a couple of ingredients, takes just moments to complete and has a super exciting finish.
Make some magic inflating conversation hearts just in time for Valentine’s Day and then join The Plato Pack so you can access DOZENS more jaw-dropping (but easy prep!) science experiments kids will love!
Getting Ready
To prep this magic kids’ science experiment, I grabbed my supplies:
- An empty bottle
- 4 Alka Seltzer tablets for each round
- 1/2 cup water for each round
- A couple balloons
- A Sharpie
Big Brother helped me break two of the Alka Seltzer tablets into small pieces and dropped them into the bottom of the bottle.
Then, we brainstormed a couple of our favorite conversation heart messages and I used the Sharpie to draw them on the balloons.
TIP: After a little experimenting, I realized that the conversation heart was more crisp and clear if I first blew it up with air, temporarily pinched it closed with my fingers and then drew the picture.
When I tried drawing the conversation heart while it was flat and empty, the image stretched too much when the balloon inflated.
The Science Experiment
After making a prediction about what was going to happen, Big Brother carefully poured the water into the bottle.
Then, I speedily stretched the mouth of the balloon with my fingers and stretched it over the rim of the bottle.
We eagerly watched the kids’ science experiment happen! Or was it magic!?
We repeated the science experiment over and over again until our pack of Alka Seltzer tablets was empty.
The Science Behind It
Similar to the reaction that occurs when you mix baking soda and vinegar, when you pour water on Alka Seltzer tablets, carbon dioxide gas bubbles begin forming.
These gas bubbles rise up in the bottle, filling the balloon with carbon dioxide gas.
More Simple Science Kids Will Love
Inspire kids to LOVE science with 30 more jaw-dropping experiments they’ll beg to repeat!
Hop over and join The Plato Pack to get instant access.
RCT3 isn’t just for kids, even though it might be marketed towards them.
Lionel Messi receives more than 41% of the vote, beating his rival Cristiano Ronaldo of
Real Madrid, who was second at 23. It would be nice to have one of these gadgets on your office
desk, if not for utility, but for the sheer fun they bring.
Hi, every time i used to check webpage posts here
early in the dawn, for the reason that i love to
gain knowledge of more and more.
This was an amazing experiment! I did it with a small group of children for 4-H. Thank you
We even tried it with sparkling water and baking soda, and another time with vinegar and baking soda. Your experiment here worked better and faster.
Hooray Valerie! I am so glad that you found an experiment that worked!
Stay STEM-inspired!
Warmly,
Kimberleigh
I’ve done this with vinegar & baking soda, putting the baking soda in the balloon & then twisting it so I could put it on the bottle.
I bet you could put the broken pieces of Alka Selzer in the ballon, twist it, attach it to the bottle, & then untwist to let the pieces drop.