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Kitchen science for kids Part 1 – Roots and Rocket-ship

Roots and


Kitchen science for kids Part 1

 I’ve mentioned before how we’re a house full of scientists in my previous posts about Snibston and Waterplay. This week is science and engineering week, so I thought I’d take you through some of the ways we (scientifically) roll.


Beth got a science book for Christmas. We have been slowly working through the kitchen science demonstrations. The first one we set up was the plasticine diver.


What did we do ?

Dave fashioned a little man to be the diver and we used a paper clip attached to a re-shaped mince pie case (a stand in for a pen lid)IMG_3517.jpg

the deep sea diver and his equipment were then submerged into a 3 liter bottle of water. Make sure the bottle is full to the brim before putting the lid on.


what did they learn?


When you squeeze the bottle and the diver will descend and when you release him he bobs back up. This is because the pressure that is exerted by squeezing the bottle condenses the air bubble in the “lid” and because the air is less dense and therefore less buoyant the man sinks. when you release the pressure the air bubble re-expands and the diver floats back up.



What did we learn ?


If I was doing this kitchen science demonstration again I would use a smaller bottle, squeezing the 3l bottle was really hard for the kids. Also its nearly impossible to find a pen lid without a hole.


What more could you do?

If I was a bit more organised I would have led into the activity with a nautically themed book perhaps A hole in the bottom of the sea. I might also have do a bit of background reading about how a submarine works. You could if you’re feeling arty have a go at making a homemade aquarium or these fish

We left it together for a couple of weeks and the kids loved it did need topping up a couple of times and we lifted the man out to refresh the air bubble every couple of days to keep it working. What demonstrations or kitchen experiments have you done?

4 Responses to Kitchen science for kids Part 1

    • Yep loving it, we’re going stargazing tomorrow night so might have a flick through to see if there’s anything related to do when we get home. 🙂

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