Hydrophobic Sand Test Tube

A test tube full of coloured science sand! This scien-tastic hydrophobic sand stays completely dry when submerged in water! The secret to this amazing sand's waterproof ability lies in its water-repelling hydrophobic coating...
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A test tube full of coloured science sand!

This scien-tastic hydrophobic sand stays completely dry when submerged in water! The secret to this amazing sand's waterproof ability lies in its water-repelling hydrophobic coating...

A cool little test tube filled with science sand fun! Pour the colourful sand in water and watch how it clumps together, making it easy to build gravity defying formations.

Perfect for young scientists of all ages - from kinder kids to senior students exploring solvents, separation methods, properties of water and hydrophobic molecules.

Pour, play and discover the world of water-fearing molecules!

Age: 3+ with adult supervision

What You Get

Test tube of hydrophobic sand. Includes 60g of Hydrophobic colourful sand in a plastic test tube. Detailed instructions and science ideas included. Colours vary. A random colour will be delivered unless specified in your order comments.

How does it work?

Hydrophobic sand starts out as normal sand but is then dyed and covered with a water-repelling polymer that keeps it dry. Pour the magic sand into a small container of water and watch it float, clump and sink. Because of its water-repellent properties, when the sand is poured into water it holds its shape and can be moulded into interesting structures under water. Pour the water off and the sand is still dry, ready to be used again and again.

Hydrophobic chemicals have many practical applications - such as creating water proof suede shoes or mud resistant construction site boots.

Compare this hydrophobic toy with our contrasting hydrophilic toys (water-loving!) like instant snow and growing spheres.


  • Hydrophobic and hydrophilic concepts
  • Polarity and surfactants
  • Water-repellent properties

WARNING: Warning: Not for consumption- Do not eat! Not suitable for children under 3.

More Information
Length (cm) 4
Width (cm) 4
Height (cm) 15
Age Group 5-6 Years, 7-8 Years, 9-10 Years, 11-12 Years, 12+ Years
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What are the shipping costs?

FREE Shipping is available on all orders over $120 to anywhere in Australia!

Orders under the value of $120 incur a low flat rate shipping cost of only $9.95 to anywhere in Australia.

Express, Registered and International delivery options are also available. The cost for these premium shipping services will be automatically calculated during the checkout process.  Please conact us if you have any queries with these services.

In some cases we may need to apply a shipping surcharge to large or fragile items, especially to remote or non-urban locations. You will be contacted by us for confirmation if this additional charge is applicable.

How long will it take for my order to arrive?.

You should receive your order within 2 to 4 working days, although to some regional and out back areas it can take up to 2 working days longer. Orders going to WA also take a little longer, up to 6 working days.

All standard orders are shipped using Australia Post's eParcel service, so you'll be kept fully informed of the progress of your order during its journey to you. Aside from receiving regular email updates, you can enter your tracking number into Australia Post's website at any time for information about the delivery status of your order.

International delivery will take from between 1 to 4 weeks depending on the destination and potential customs clearance delays.

When will my order be shipped?

We ship every Victorian business day. Orders received and paid for by 12pm AEST time will generally be shipped the same day.

If you require your order urgently, we have a next day delivery express service available.

What locations do you ship to?

We ship to both Australian and International customers.

What shipping options are available?

The majority of orders are shipped using Australia Post's trackable eParcel service, with larger orders being sent by national courier.

We also have options for express or registered post. A number of international delivery options are also available. These can be selected during checkout.

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