Just look at the bed of forget-me-nots, or a copse of bluebells; or, for that matter, try to see the Avories' caravan.

The window frames and bars were white.

The spokes and hubs of the wheels were red.

It was most awfully gay.
Inside--but the inside of a caravan is so exciting that I hardly know how to hold my pen.

The inside of a caravan! Can you imagine a better phrase than that?
I can't.