'Holy infant so... err... something...'
We've all played them in school, but can you remember what they're called?
It's time to step back into your school days and identify these delightfully obscure musical instruments.
And no, they're not just called 'that rattly thing', 'the pipes that you hit together', or 'that shuddery ball on a stick'.
Let us know how you get on in the comments below...