Diving Cartesian Jellyfish

Squeeze a bottle of water with the floating Jellyfish, and watch it move up and down.
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Diving Jellyfish will perform amazing hydrodynamic tricks! Just place him in a bottle of clean water, squeeze the bottle and watch as Jellyfish spins and dives up and down.

A fun, engaging way to learn about Newton's Laws of Motion. You'll be jumping around like Archimedes after a bath and shouting "Eureka!" as you unravel the mysteries of this diving jellyfish.

Age: 5+

What You Get

Jellyfish by TEDCO. Model number 12090. Includes one coloured plastic jellyfish. Requires refillable water bottle (not included).

How does it work?

A classic Cartesian diver demonstration with a Jellyfish twist. When you squeeze the water bottle, the air inside the Jellyfish is compressed and allows more water to enter, increasing the plastic Jellyfish's density and causing it to sink. When you release the bottle, the pressure drops again. The air in the Jellyfish expands, pushing water out. This makes the Jellyfish lighter, so it floats to the surface.


  • Laws of Motion
  • Buoyancy
  • Pressure

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

More Information
Length (cm) 8
Width (cm) 1
Height (cm) 16
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.

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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