Gigantic Growing Spheres

Place these spheres in water and watch them expand about 300 times! Pack of 5 spheres.
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Like our smaller growing beads, place these spheres in water and watch them expand about 300 times, producing mega gel-like spheres. You'll love the feel of the slippery, spherical gel! These super-sized spheres start with a diameter of about 1.5cm and grow to a monster diameter of about 7cm.

A truly remarkable absorption demonstration! Can you determine the change in volume, mass and diameter? Add a few drops of food colouring to the water and grow coloured spheres. Try using them as giant squishy lenses in optical experiments and note the magnified, inverted image.

These mega spheres are composed of a super-absorbent polymer, and can be dried and reused. They take between 2 and 3 days in water to reach their maximum size. Because they contain 98% water, the clear spheres will be invisible in water.

Age: 6+ with adult supervision

What you get

Pack of 5 spheres ready to grow. Spheres expand from approximately 15mm to 70mm. Choose between clear or single coloured spheres using the drop down menu above.

How does it work?

Growing spheres are small polymers that have a strong affinity for water. Like a sponge, they swell to about 300 times their size. Simply place the spheres in clean water in a bowl or container and allow them to sit. In 24 72 hours, they will reach their maximum size. If you use warm distilled water or deionized water, the expansion will be even greater.After growth, they can be dried and used again the ultimate in recycling!


  • Superbsorbent polymers and their use in real life applications
  • Hydrophilic (or water loving) substances
  • Osmosis
  • Evaporation
  • Gels
  • Optics


Although non-toxic, these spheres are NOT toys. They are made from superabsorbent polymer and should not be placed in the mouth. Adult supervision is recommended.

WARNING: CHOKING HAZARD Small parts. Not for children under 3 years.

FIRST AID: If swallowed do not give liquids, seek medical advice immediately.

More Information
Length (cm) 5
Width (cm) 2
Height (cm) 10
Age Group 5-6 Years, 7-8 Years, 9-10 Years, 11-12 Years, 12+ Years
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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.

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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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