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Magic Inflating Conversation Hearts

January 13, 2015 by Malia Hollowell Filed Under: Chemistry, First Grade Science, Kids' Science, Kindergarten Science, Plato's Blog, Preschool Science, Winter 6 Comments

Activity for ages 3 to 8.

If you’re looking for a simple science experiment with a BIG wow factor, you’ve come to the right spot. This science activity 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!

Magic Inflating Conversation Hearts!! Fun Valentine's Day science for kids.

Getting Ready

To prep, 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.

Valentine's Day science for kids.

Then we brainstormed a couple of our favorite conversation heart messages and I used the Sharpie to draw them on the balloons. Fun Valentine's Day science for kids.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 uninflated, 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 magic happen.

Super simple and fun science experiment for kids. Magic Inflating Conversation Hearts!

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.

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Malia Hollowell
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Malia Hollowell

Founder at Playdough to Plato
Malia is a National Board Certified teacher who inspires educators with playful approaches to early childhood education. She earned her Master’s from Stanford University and has taught in Pre-Kindergarten through 2nd grade. Malia shares her motivating learning activities on her two popular teaching blogs Playdough to Plato and The STEM Laboratory.
Malia Hollowell
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Latest posts by Malia Hollowell (see all)

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About Malia Hollowell

Malia is a National Board Certified teacher who inspires educators with playful approaches to early childhood education. She earned her Master’s from Stanford University and has taught in Pre-Kindergarten through 2nd grade. Malia shares her motivating learning activities on her two popular teaching blogs Playdough to Plato and The STEM Laboratory.

Comments

  1. Shantell says:
    January 15, 2015 at 8:17 am

    RCT3 isn’t just for kids, even though it might be marketed towards them.

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    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.

    Reply
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    February 26, 2016 at 12:29 pm

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  3. Valerie Ryan says:
    January 27, 2018 at 12:47 pm

    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.

    Reply
    • Kimberleigh says:
      January 29, 2018 at 8:28 am

      Hooray Valerie! I am so glad that you found an experiment that worked!
      Stay STEM-inspired!
      Warmly,
      Kimberleigh

      Reply
  4. Nysha says:
    February 7, 2018 at 12:35 pm

    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.

    Reply

Trackbacks

  1. Valentines Day | Home Educators Association of Virginia says:
    February 5, 2018 at 2:01 am

    […] magic inflating conversation hearts from Playdough to Plato are a simple-to-create science experiment with a big […]

    Reply

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