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Science & Art for Kids: Salt Pendulum

by on January 9, 2013

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Ever since I bought a copy of The Best of Making Things: A Hand Book of Creative Discovery, originally published in 1973, I have had my eye on this project: the Salt Pendulum. I love the combination of science, art, and kinetic fun! We added the idea of using colored salt for a more vibrant project and I have to say it was worth it. Even my always skeptical son decided to join in the fun for awhile.  To make your own colored salt visit my tutorial here

Salt Pendulum

Materials:

  • Colored Salt We used (4) 26 oz. containers worth of salt
  • Funnel
  • String
  • Thumbtacks (optional)
  • Beads (optional)
  • Hot Glue
  • Black paper or board
  • Tape
  • A doorway for hanging the pendulum

Instructions:

  • Step One Punch three evenly spaced holes near the top of your funnel.
  • Step Two If you are using thumbtacks push them through the holes and hot glue a bead onto the pointed end to protect fingers.
  • Step Three Cut three equal lengths, roughly 10” to 12”, of string and knot them together at the top.
  • Step Four Tie the loose ends of the strings to the thumbtacks. If you are not using thumbtacks, thread the string through the holes in the funnel, knot them securely, and add a dab of hot glue to the ends.

Salt Pendulum Steps 1-4

  • Step Five Figure out where you will hang the pendulum. We hung ours outside on our porch between two hooks we have on the underside of a beam. The hooks are roughly 4 feet apart. The pendulum can easily be hung in a doorway as well. Just hang two hooks or place two nails on either side of the top of the doorframe. Because the salt is messy make sure it’s in a doorway or location you can easily clean afterwards! Once the hooks are in place tie a taut piece of string between them.
  • Step Six Cut one long piece of string and tie it to the knotted strings on the pendulum. Center it on the upper cross string and tie it. Remember that the salt will weigh down the pendulum so either tape the end of the funnel shut and pre-fill the pendulum when hanging, or hang the pendulum about a foot above the floor to account for the weight of the salt.
  • Step Seven Place your black board/paper underneath the pendulum
  • Step Eight Tape the bottom of the funnel shut and fill it with one of the salt colors.  Make sure the salt is not clumped together but nice and loose so that it easily flows out the funnel.

Salt Pendulum Steps 7-9

  • Step Nine It’s ready! Ask your child to either untape the bottom or untape it and let them swing the pendulum gently. Off it goes!

We made several “drawings” by layering the colors of salt and changing the direction of the swing each time. When you’re ready to start fresh, empty your salt into a bowl and save it for another project. Yes, the colors will be mixed but I don’t like to waste anything!

I absolutely loved how this project turned out. It felt like we were making planetary drawings; now if I could only figure out a way to preserve them….

Enjoy!

For the Kids FridayPIN MEmeSkip To My Lou

{ 11 comments… read them below or add one }

Mums make lists (@mumsmakelists) January 11, 2013 at 2:24 pm

Love this – looks great and such a brilliant way to see and talk about all sorts of different concepts.

Reply

Ana Dziengel January 12, 2013 at 2:35 pm

Thank you! I love it when a project can explore different concepts in one sweet little package.

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Diana Rambles January 13, 2013 at 2:52 am

Love love love those pendulums!!!

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Ana Dziengel January 13, 2013 at 3:35 pm

Thank you! One of those fun little quirky projects!

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Cindy deRosier April 22, 2013 at 11:04 am

I’m the Editorial Assistant for Fun Family Crafts and I wanted to let you know that we have featured your project! You can see it here:

http://funfamilycrafts.com/salt-pendulum/

If you have other kid friendly crafts, we’d love it if you would submit them. If you would like to display a featured button on your site, you can grab one from the right side bar of your post above. Thanks for a wonderful project idea!

Reply

Ana Dziengel April 23, 2013 at 5:27 am

Hi Cindy,
I’m thrilled to be included in the list of amazing crafts you have on Family Fun Crafts! Thanks so much for the features!
Ana

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sunny July 20, 2013 at 4:46 pm

I remember doing this as a kid with plain sand. I can’t remember the details, but it make the oval because of the earth’s rotation (so now it’s a science project AND art!). I am thinking of trying it with poster board sprayed with tacky adhesive on the chance of preserving it. Maybe I’d follow with a coat of acrylic sealer? Then again, I might just take a picture! :)

Reply

Ana Dziengel July 21, 2013 at 6:23 am

Thanks for stopping by Sunny! Share a pic of your results here when you’re done! I’d love to see it!

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sunny July 20, 2013 at 4:56 pm
Sally October 7, 2013 at 10:16 am

If you want to preserve it do it with a sauce bottle filled with diluted paint! You could even do the salt on top for added effects.

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Ana Dziengel October 11, 2013 at 4:25 am

Sally, that is such a great idea! I love it!

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