Made me laugh

I overheard a funny conversation when out with friends today.

Mummy, what does that sign mean?

I don't know *looks deep in thought*

But what does it mean mummy?

It means, no citrus fruit allowed!

Hey, home educators sure know how to think out of the box! Here's hoping there are no people round there daring to eat citrus fruit - or ride bicycles for that matter. Or perhaps, it just applies to unicycles?