Diving Submarine

A chemical reaction makes the submarine dive and automatically surface time and again.
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Original 1950s cereal box prize! Just fill the top chamber with a pinch of baking powder (not baking soda) and shake the mini sub under water. A chemical reaction makes the sub dive and automatically surface. Give the water a gentle stir and the sub will cruise in circles. It really is like magic to young children.

Age: 6 +

What you get

Plastic mini sub, 11.5cm long, in a blister pack. Sub is made of plastic.

How does it work?

The sub is heavier (more dense) than water and sinks to the bottom, as water reacts with the baking powder carbon dioxide is formed, making the sub buoyant enough to rise to the surface. When the sub reaches the top, it turns on its side, gives a burp (bubble) to release some of the gas and then sinks again. This process is repeated on average 10 times. Note, baking powder is baking soda with an acidic ingredient pre-mixed, usually cream of tartar. This is necessary for the resultant chemical reaction.


  • Chemical reactions
  • Floating and sinking
  • Buoyancy


The package looks like it has come straight from the 1950s with easy to read instructions on the back.

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

More Information
Length (cm) 17
Width (cm) 14
Height (cm) 1
Age Group 3-4 Years, 5-6 Years, 7-8 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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