First of all, take pictures of fire. Not just one or two pictures. LOTS of pictures. Fire looks different every time you photograph it, so don't stop snapping those photos for a minute. Actually this one can be done when it's not flooding as well, if the number of fire photos I have ever since Emily learned to use a camera is any indication.
Play board games and card games. Change all the rules to make it more interesting.
When you hear the sound of a hatchet hitting wood, sit up and stare (with your mouth hanging open) the entire time the wood is being chopped.
Imagine what it would be like to be the one holding the hatchet.
Drool a little.
Try to climb up in the rafters.
Try to climb the walls.
Forget that younger kids are watching.
Forget that they will try to imitate you.
Forget that they will have to be rescued when they can't get back down.
Get into the most difficult spot you possibly can.
Scare the crap out of your mother.
Dust off the entire top of the rafters with your shirt.
And most importantly.....play in the rain.