Cool party trick hidden in Canadian dollar bills

Did you know you have hours of endless amusement in your own Canadian wallet without having to spend anything?

BBC Science presenter Steve Mould was visiting Canada over the holidays and while he was here, he made a video explaining the nifty innovations built into Canadian polymer bank notes of all denominations.

Did you know that if you shine a laser light through the transparent Canadian maple leaf, or look through it at a single point of light, you will see the denomination written out?

It's made of a diffraction grating, which splits light into several beams in different directions.

Here's the video explaining how to do it:

It's just one of several counterfeit prevention features built into Canadian dollar bills. But, needless to say, this one is the most fun at parties.