DIY Magnetic Shapes

I’m always trying to find ways to repurpose supplies I purchase for activities. We have a big bag of magnetite powder we use to make magnetic slime, but I haven’t thought of another use for it…until now! By mixing it with glue and baking soda, you can pipe (like frosting) any design you can think of, and it will stick to a magnet. This is perfect for magnet-on-a-pole fishing games. Read on to learn more!

Materials

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Method

Note: Magnetite powder (an iron oxide) is very messy and should not be touched with bare hands as it stains. Wash hands thoroughly after doing this. Older children may help with steps 3-6, but should always be supervised as any large amount of iron is dangerous to ingest. The dried shapes are safe to handle with bare hands, but the shapes and magnets should not be handled by children who put things in their mouth.

  1. In the ziplock bag, measure in a 1:1:1 ratio the magnetite powder, school glue, and baking soda. Since the first two ingredients are so messy, it is totally fine to just eye-ball the amounts. This is a very forgiving goop.
  2. Squeeze out the air and seal the ziplock bag.
  3. Mix the contents thoroughly by squeezing and mushing.
  4. Snip off a small lower corner of the bag and pipe designs onto wax paper like you would if you were decorating a cake. (Though these will not be incredibly fragile, you don’t want any shapes to have lines with less than ~1/4 inch thickness or they will break with typical child’s play.)
  5. Let dry for 24 hours.
  6. Paint the shapes with paint or nail polish.

Discussion

Magnetite is a natural mineral made of iron and oxygen. It is attracted to a magnet and in some cases can be magnetized to become a permanent magnet. Magnetism was discovered millennia ago by observing metal sticking to naturally magnetized magnetite, called lodestone. Though I haven’t been successful in magnetizing the shapes made by this project, it is possible to magnetize magnetite by placing it in a strong magnetic field (eg. very strong magnet or electromagnet).

The shapes you will make are called magnetically soft, in that they become temporary magnets when exposed to a magnetic field (i.e. other iron-containing things will become attracted to it when it, itself, is in a magnetic field), but if the magnet is removed, the shape becomes unmagnetized.

How to Play

  • Alphabet Fishing (learning letters): We tied a magnet to a wooden pole and went “fishing” for magnetic fish shapes and letters covered by dried rice in a plastic bin. You can use this activity to learn upper or lower case letters, or spelling a name.
  • Fishing for Compliments (learning to read): We made magnetic hearts and I wrote adjectives that complimented my daughter on the back of them (eg strong, smart, kind, etc). She fished for them in a tub of dried rice and black beans and sounded the words out as she found them.

As always, let us know if you’ve tried this on Instagram and Twitter @cara_florance. Tag us and include the hashtag #IBravedTheElements for a chance to be featured!

xoxo

Cara

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