Thanks for all the responses.
We live in Georgia, USA, where peanuts and peanut butter are important parts of the agricultural economy. But, as I mentioned before, peanut butter (usually with grape jelly) is a staple for kids' lunches all over the US, and is often on restaurant menus as one of the kids' meals offered. I grew up in Missouri, and I specifically remember that I ate a peanut butter sandwich for lunch every day of third grade. But I figured peanuts would have to be imported into the UK, since the weather is not warm enough to grow them, and we didn't know how common it would be to eat peanut butter there.
