Science in the Library

Today we made videogames using Scratch, based on the infamous "Flappy Bird" videogame that brought its creators notoriety and established them in the halls of memorable bad game design forever :) We followed a tutorial I created and chose new sprites for our flappy character--many kids chose airplanes, fish, or other animals, and a few chose bats. The end code looks something like this (this is just the code for the bat that flies through the pipes): The final product is supposed to work like this (click on the picture and you'll be taken to the game which you can play): If you'd like to see the kids' projects they are posted here: Pasadena Library Kids' Blog The kids did a great job. Even one child who was not really very experienced with Scratch turned out to be quite sharp and able to follow all the difficult instructions. Despite having a lot of technical difficulties, almost everyone was able to go home with a finished game emailed to the...

Monday's hands-on science program, "The Science Behind Recording Music," challenged tweens to come up with several iterations of a gramophone that could play the sound stored on a vinyl record with only their hands to power it. First, tweens learned about the history of sound recording and its great inventors, from Leon Scott to Alexander Graham Bell, to Edison to Berliner. I engaged the kids in some fun questions to test their critical thinking skills, like: "How many grooves are on each side of a record?" and "How many times a second would a record turn if it's turning at 33 1/3 revolutions per minute?" Here are my slides from that presentation: Science of Recorded Music from AnnMarie Ppl And here is the video I created to give them a sample of what they would be doing: Then we started spinning records of our own. We made a gramophone out of a tin can, aluminum foil, and a pin, and lowered the pointy end of the pin onto the...

We recently had a few STEAM-related programs at the library that I wanted to share on here. The first was called "Tablets and Tech for Kids," and we were using the library's iPads and robots to learn coding, as well as using the library's iPads and Osmo game systems to complete physics and geometry challenges. Then we had another program about making musical instruments, which encouraged kids to try to experiment and find ways to design their instruments to play better. Kids and parents struggled to make great drums with very taut balloon membranes. Children also tried to make their rubber-band guitar strings more taut, and played with different kinds of rubber bands to get the design they wanted.

This afternoon we had a program at Pasadena Library about how to make a musical instrument--something that would produce not just noise, but definite pitches that you could change or manipulate.  We learned about aerophones, chordophones, idiophones and membranophones, and then got a chance to make our own DIY instruments. Here was my setup: Not shown: a large container of water, which we needed for some of the instruments. First, we talked about the properties of sound and experimented with a "head harp," which is made by putting a string through a wire hanger and holding both ends up to your ears to hear what sounds it made when we let the hanger hit the wall.  Without the strings being close to your ears, all you hear is a faint click, but when the strings are held up to your ears it sounds like a gong or a church bell.  This helped to convey a lesson about how much faster and better sound moves through solids than through air. After some mo...

I was doing some work on the nonfiction collection today, focusing on the shelves about astronomy, space, planets and time. While examining the books closely, I came across a few that I want to remember as being really interesting: Faraway Worlds: Planets Beyond Our Solar System , by Paul Halpern and Illustrated by Lynette R. Cook, is a fascinating look at the search for distant planets. It contains simple visual demonstrations of how scientists are able to find stars that have planets--the "wobbling star" is explained with a good diagram about the gravitational pull of a large planet. Halpern's writing is very accessible and Cook's illustrations take the book to another level of imaginative wonder, as she artfully speculates what a beach might look like on a planet with two suns. There is even a page at the end dedicated to explaining how Cook comes up with her illustrations. Really a fantastic and imaginative read. I found a lot of books about the Hubble ...

This is from the book Howtoons: Tools of Mass Construction by Saul Griffith, published by Image Comics. It tells you how you can make a flute from a turkey baster, just by filling the baster halfway with water and then squeezing the baster so that the water rises and makes different pitches. It's similar to many other ideas involving wine glasses and other things, but I just had never heard of using a baster before! And what's nice about the baster is you can actually manipulate it like an instrument. Different water levels will resonate at different frequencies. Maybe I'll do this with my library for my Science of Music program this summer!

For today's Curiosity Machine classes, our last meeting of the four-week session, we did an exciting project from the Curiosity Machine website: balloon helicopters ! We learned about different kinds of energy, particularly elastic potential energy. Elastic potential energy is the potential energy stored when you bend, stretch or deform an object, and that energy converts to kinetic energy as the object bounces back. Here's a great website that explains it pretty well: Physics 20 Project . We discussed examples of elastic potential energy using a Family Feud presentation I made on Scratch. You can click on the image below to see the project, though it's supposed to be used as a tool for discussion: The project itself was challenging and I'm glad I worked on my sample ahead of time. But it's so exciting to see those balloons fly! First, you have to cut a boba straw to about the same length as the rubber band you plan to use (when it's at equilibriu...