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No-Rust Magnetic Discovery Bottle

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August 5, 2015 by Katie T. Christiansen 14 Comments

Magnetic Discovery bottles are a perfect science and sensory activity! The problem is that they rust when you add water. Thankfully, I have found a solution! Now you can make long-lasting discovery bottles that don’t rust. Here’s our new and improved no-rust magnetic discovery bottle.

Therapists have told me that they love these sensory bottles because it has so many benefits! Just like any other sensory bottle, these no-rust discovery bottles are great for:

  • Calming and relaxation
  • Working on focusing
  • Hand-eye coordination
  • Fine Motor Skills
  • ADHD, Autism, Sensory Processing Disorder, and more

Rust Resistant Magnetic Discovery Bottle - Preschool Inspirations

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Magnetic discovery bottles are so fun because you can make the objects dance around! Then when you put a strong magnet on the outside, they come together.

STEM Magnetic Rust-Free Discovery Bottle by Preschool Inspirations

We can’t get enough of these really!

No-Rust Magnetic Discovery Bottle

Here’s a video of how it works!

Or watch it here on YouTube:

It’s super simple too! Here are the ingredients of this bottle:

  • Mineral Oil or baby oil
  • Magnets from the Super Magnet Lab
  • Nuts and washers similar to the ones in this set.
  • Voss Plastic Water Bottles (empty out all of the water)

Mineral oil is the magic behind this bottle! When you use water, your discovery bottle will rust. However, mineral oil makes this rust-free! Just make sure there is no water in your bottle at all!

You can buy mineral oil at your local grocery store. I found it for $2 on sale. Some dollar stores have it too. Baby oil can also be substituted because it’s main ingredient is mineral oil.

The water bottle I am using is called a Voss plastic water bottle. Voss water bottles are available at some grocery stores, or I have even found them at TJ Maxx. But the absolute best place to find them is Amazon because they are the best price, and it is super convenient to have them delivered to your home.

Magnetic Rust-free Discovery Bottle by Preschool Inspirations-2

For magnets, I have the Super Magnet Lab because we get so many uses out of it. It includes the magnet wands and tons of other great magnets. Plus, it has this great horseshoe-shaped magnet, which is super strong and easily attracts the magnets inside.

However, you could just get a magnetic wand with magnetic chips.  Almost everything I put in this sensory bottle we already had around the classroom.

Step-by-Step Instructions for a no-rust magnetic discovery bottle

  • Empty out the water bottle and make sure it is nice and dry
  • Add magnets
  • Add baby oil or mineral oil to 2/3 or 3/4 of the bottle
  • Use a magnet wand

Then super glue the lid to the bottle…just in case! These objects are all choking hazards, so it’s always a good idea to keep checking to make sure the super glue is holding. I put glue on mine about every three to six months with little ones around.

Then enjoy the magic of a no-rust magnetic discovery bottle!

Rust Resistant Magnetic Discovery Bottle

Here are some more of my favorites sensory bottles!

Ocean Discovery Bottle

Ocean Creature Discovery Bottle - Preschool Inspirations-5

 

 

6 Ways to Make a Calm Down Jar

6 Ways to Make a Calm Down Jar by Preschool Inspirations-34

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Katie T. Christiansen
Creator at Preschool Inspirations
Katie has spent 17 combined years in the Early Childhood field as a teacher, preschool owner, and educational writer. She has worked in profit and non-profit programs, high-risk schools, and started an in-home preschool and outdoor collaborative preschool program. She adores being a mom to three children, and her youngest is currently in preschool.
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Filed Under: Calm Down Bottles, Discovery Bottle, Science, Sensory Tagged With: magnet, preschool science, science center, sensory bottle

Comments

  1. Barbara says

    August 5, 2015 at 7:19 pm

    Last yr my pre k did this with square plastic containers. The children loved it. We also used Styrofoam cups and places magnetic stuff inside, the children ran the magnetic wands around the cups and moved the items to the top of cups!

    Reply
  2. Heather says

    August 6, 2015 at 4:31 am

    These look great. I will make them for use in my toddler room! I love your work very inspirational. Already my children have had great fun with your sensory bottle ideas. Thanks.

    Reply
  3. Crystal says

    February 11, 2016 at 8:01 am

    these look great! But curious, did you fill the entire bottle with mineral oil or only a lil bit with water? Thanks for answering in advance.

    Reply
    • Katie says

      February 11, 2016 at 10:49 am

      Thanks for visiting, Crystal! The entire bottle has mineral oil. Even a little bit of water will rust it. I hope that helps :).

      Reply
  4. ashields36 says

    February 18, 2016 at 5:09 pm

    another idea for rust free! use colored rice instead of water!! the kids can shake the bottles to “hide” the magnetic things and then use a wand to find them again! sorry no picture.

    Reply
    • Katie says

      February 18, 2016 at 9:43 pm

      Yes, that would be a great idea for a dry ingredient sensory bottle or an I spy bottle :).

      Reply
  5. Michelle says

    September 9, 2017 at 3:54 pm

    Do pipe cleaners work well in the mineral oil? This looks like a fun activity!

    Reply
    • Katie says

      September 11, 2017 at 7:33 pm

      I’ve not tried pipe cleaners with mineral oil, but if you do, I’d love to hear how it goes :).

      Reply
  6. Sharyn says

    February 1, 2018 at 1:22 pm

    I absolutely love your discovery bottles! Do you think they would work with glass bottles rather than plastic?

    Reply
    • Katie says

      February 2, 2018 at 9:37 pm

      I have a couple of glass ones. I think they work well, but we work a lot on being careful with them.

      Reply
  7. di Livingston says

    July 13, 2019 at 9:14 am

    So how long have you had it, I guess my point is still not rusted in say 8 years etc?

    Reply
    • Katie T. Christiansen says

      July 16, 2019 at 11:58 pm

      Hi Di! We’ve had it for several years now, and it still is great. Mineral oil or baby oil for the win!

      Reply
  8. Megan says

    January 31, 2023 at 10:42 am

    Just want to say that bits of pipe cleaners are awesome in this! They’re so lightweight that they drift nicely in the oil and jump quickly to the magnet. We also used colored paperclips, brads, a couple jingle bells, random hardware from the garage, and some spacers and beads from my jewelry making supplies.

    Reply
    • Katie T. Christiansen says

      February 3, 2023 at 12:27 pm

      Those are brilliant suggestions!

      Reply

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I'm Katie, and I'm a veteran preschool teacher, child development research junkie, and mom of three who lives on little sleep and turns my kitchen into an art and science laboratory.

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