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Bakers have used yeast to make bread for millennia! We now know why it works and how a little sweetness goes a long way. Safety: When dealing with food, use clean hands and clean equipment. Be careful when using the oven by wearing oven mitts and ask an adult to help you out.

Difficulty: Tricky Consider the following sequence of numbers. What number comes next? 1, 1, 2, 3, 5, 8, 13…

There’s nothing like a pretty flower to brighten your day. Will this quiz brighten yours when you get full marks? 

What is the area of the orange star in the centre? The blue circles each have an area of 3 square centimetres, and the big square has sides that are 4 centimetres long.

Scientists thought they knew how gas giants like Jupiter were made. Now a newly spotted planet in a faraway solar system is challenging the recipe.

You would never add a heap of salt to your ice cream, but this tasty treat can be made by taking advantage of a chemical property of salt and a bit of elbow grease. Here’s how! Safety: The ice in this activity can get very cold, well below freezing. Take care not to touch it…

Jing is taking her submarine to the bottom of an ocean trench. The first day she goes half the distance to the bottom of the trench.

Sharpshooter insects get their name for catapulting droplets of their pee! Why don’t they pee in streams like other animals, including us humans?

Time for a tricky triangle teaser! If the purple shaded triangle has an area of 2, what is the area of the largest triangle?