The one thing they don't sell

Dad and I walked to the shops this afternoon to buy some groceries for tea.

As we entered the first aisle dad asked "so, what do we need?"

I answered.

"Um, I'm not sure they have that here", dad said.

Right next to us was staff member packing the shelves, he heard dad's reply, and wanting to be helpful asked, "can I help you find what you're looking for?"

Dad laughed, "it seems we're after some Racing Car Toast".