Summer Science Experiment Finisher - Sound Travel

Today was the end of my monthly calendars chock full of ideas to keep Koen engaged and learning this summer.  It was great to have a plan to direct our many afternoons hanging out together before his rest time while the little guys napped.  I think one of our favorites was the weekly science experiments.  There's nothing like seeing a young face light up as they discover something new and science can be so simple, but so amazing (and such a great way to just stand in awe of our Creator!).

Today we learned about sound.  First we used a balloon to show how compressed air molecules can amplify sound (who knew?).  It really works!  Hold it up to your ear and try speaking into the balloon.  The listener will definitely hear you. =)

Next we did the classic telephone experiment.  It still was impressive to me how much louder a voice sounds when spoken into a cup between a tight string.  Seriously, the simplicity of these experiments narrowing in on a complex phenomenon is pretty fun.  Here are the telephonists.

Now, the book I've been using for these experiments unfortunately did not have any ideas on how to make people sound quieter.  If they did I think I would create that apparatus and attempt to get Koen to wear it/use it during all his waking hours.  Seriously, Koen, I love discovering new things with you.  Thanks for experimenting (or as we call it, "observigating") this summer.  Special memories.  I'll miss our weekly science moments during the school year, don't worry, we'll work in some here and there (he's already requested this for weekends/days off).