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To celebrate the launch of Double Helix Extra, we’ve scoured the Double Helix prize cupboards and found some fantastic little rockets to give away. These Liquifly Fizz Rockets take vinegar and bicarb and turn them into motion! Simply measure in the fuel, and the rocket will fly more than five metres.

Learn about the different parts of plants, as well as the science of preservation, by making your own pretty potpourri.

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!

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. You will need Red food dye Chocolate topping (or corn syrup) Water Measuring cup Mixing bowl Spoon Drinking straw Old clothes A large sheet…

You’ll find yourself going a little loopy with this puzzle, but it’s worth unravelling the secret.

Psychologists often use simple games to determine how people make decisions when sharing and saving rewards, such as cash. In this case, we’ll explore the game of dictators using chocolate!

Len Choa is a two player game from Thailand. It’s an asymmetric game, which means the two players have different rules to follow. In this game, one player controls a pack of six leopards, and their opponent controls one scary lion!

Mathematicians can find patterns wherever there are numbers. In this activity, see if there’s a pattern in the numbers inside a newspaper!

Have you ever made a paper snowflake? Here’s a different twist on a classic craft activity.

Bushfires are destructive and dangerous. They can be fickle, but scientists are developing ways to predict their behaviour. This activity shows you one way that a scientist might think about bushfires.