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There’s a lot we don’t know about the tooth fairy. We don’t know what they look like, or how they get around, or even what they do with all the teeth they gather. But researchers around the world have been keeping tabs on the finances of this elusive tooth collector.

This quiz will take you from the number zero to 7.5 billion kilometres out in space! Can you answer this mixed batch of questions across science and maths? If you’re after more fun science for kids, subscribe to Double Helix magazine!  

Running an election is a good way to let everyone have a say. In this example, we will be voting for the tastiest vegetable, but if you design your own ballot papers, you can use this method to run an election about anything!

Emily has twice as many brothers as she has sisters. Her brother Bill has one more sister than he has brothers. How many boys and girls are in Emily and Bill’s family?

Plenty of owners will tell you their cats are smart, compassionate and wonderful creatures. Scientists are curious about whether this is actually the case. Until this year, scientists weren’t even sure if cats knew their own names.

Scientists love to name things. In this quiz you can discover all kinds of strange and wonderful names that scientists use in their jobs, and where those names come from.

I’m thinking of a two digit number. If you add the digits together and then multiply by three, you get the number back again! What number am I thinking of?

When you think about it, whales seem a bit strange. They live in the ocean, but breathe air. That suggests that millions of years ago, their ancestors walked on land. But the change didn’t happen overnight.

From objects in free fall to the fall of the dinosaurs, we’ve got some tricky teasers for you today. Hope you don’t trip up!

At Three Peaks School, they’re planning to build a gigantic triangle. The sides have just arrived, on the back of some truly ridiculous trucks, and with police escort.