The windows don't open
They're fragile and break easily. Air the place through the door, held wide for a few minutes — it works just as well.
Close the door gently
Don't slam it. This is a caravan, not a house: the whole wall feels it.
A game missing one piece is a broken game
Before you close the box, check that everything's there. The piece that slid under a cushion today is missing for every child next week.
There's no bathroom or shower here
The nearest one is in the kitchen building. Worth knowing before a long afternoon of playing.
For the grown-ups reading over a shoulder
Small children need an adult nearby. The club isn't supervised by us.
Be kind, help the little ones, and if something's wrong tell an adult. That's all.