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Here’s a great trick of the light that looks like magic. Put a picture into water, and the colour disappears! And the best thing is, the colour comes back when you take the picture out again.

After a rainstorm, doesn’t the world seem so clean? You might think of storms washing the earth – but they’re cleaning the air too!

Difficulty: Tricky Can you take 2 from FIVE and leave 4?

This quiz is all about change! Can you get full marks first try, or will you need to change your answers?

Black holes have such strong gravity that nothing, not even light can escape its clutches. We like to imagine that they are far away, like the supermassive black hole in the heart of our galaxy. But there may be black holes much closer to home. We’re just not very good at seeing them – after…

NASA’s Ingenuity helicopter has made history by flying on Mars. To celebrate the first flight of a copter on another planet, here’s a simple unpowered helicopter you can build at home!

Difficulty: Tricky While out adventuring, Heracles the Hero came across a monstrous, 9-headed Hydra. Without pausing to think, Heracles pulled out his sword and started cutting off the Hydra’s heads. After several minutes of cutting, Heracles realised it was taking ages to remove the heads. Then he remembered something his friend Euripides told him.

This quiz is all about explosions. Can you make a big bang with correct answers, or are you set to fizzle?

Can you blow a paper ball into a bottle? It sounds easy, but it’s harder than you think!

Do you like eating red lollies or drinking strawberry milk? If so, there’s a good chance you’ve been eating insects! But soon there might be a new way to make these treats red.