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Hands-on posts

Lava fizz Activity

by David, 12 July 2018 | 2 comments

Lava lamps look super cool, but they can be expensive and hard to find. With this activity, you can make your own bubbly lava and learn a bit about oil and water!

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Invisible glass Activity

by David, 28 June 2018 | 0 comments

Glass of water with a ock floating in it.

Find out more about invisibility by hiding a glass jar in plain sight. Then, use the jar to create a clever illusion, making a rock appear to float mysteriously!

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Shrinking plastic Activity

by David, 14 June 2018 | 2 comments

Image of a tiny giraffe held between someones fingers.

Have you ever wanted to draw really small pictures? Here’s a trick – you can just draw normal sized ones, and then use some special plastic to shrink them!

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Play Scopa Game

by David, 17 May 2018 | 0 comments

Some playing cards

Here’s a traditional card game that’s bound to get your brain pumping. Being able to add up will help, but there’s plenty more to puzzle over!

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Make a cloud Activity

by David, 3 May 2018 | 0 comments

Photo of a glass jar with water in the bottom and a baloon stretched over the opening.

Create a cool cloud inside a jar using these instructions.

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String tower Activity

by David, 5 April 2018 | 0 comments

A piece of string, knotted at regular intervals, being held srtaight by three plastic strips which attach to the knots in the string.

How do you make string stand on its end? To find out, read on…

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Balloon bus Activity

by David, 22 March 2018 | 3 comments

Photo of a man sitting on a bus holding a red balloon on a string.

When you’re on a bus, corners can push you sideways. But what does it do to a balloon? Grab a balloon and get on board to learn a thing or two about inertia.

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Potpourri preservation Activity

by David, 8 March 2018 | 3 comments

A bowl filled with dried rose petals, orange peel and cinnamon sticks

Learn about the different parts of plants, as well as the science of preservation, by making your own pretty potpourri. Safety: Vegetable peelers are sharp. Ask an adult to help.

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Double Helix Extra: your new email update! Update

by Jasmine, 28 February 2018 | 0 comments

10 year old holding tablet and atomic model.

Double Helix magazine is excited to announce that we’re merging our newsletters Science by Email and Maths by Email, and adding a splash of technology and engineering news. Keep an eye out for our new look email, called Double Helix Extra!

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Blood-splatter by numbers Activity

by David, 16 February 2018 | 1 comments

A blood spot with measurements for width and length

Blood left at a crime scene can tell you a lot about the events. To rewind the clock and look back in time, you just need a ruler and some trigonometry.

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