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Do not panic!
Make sure you have the following supplies at hand:
12 sheets of 1/4 inch plywood, at least 3' by 4'
6 gallons of water
At least one dozen batteries in each of the common sizes
String
Sticky tape
Wire
Tinned food such as beans; at least three tins per person per day
Use the sticky tape and string to construct a cubby house (or "fort") out of the plywood. The tins of beans can be used to defend your fort. Either throw them at people who approach, or, in close combat, ding them on the head.
For entertainment you can try touching the batteries to your tongue. Wire them in sequence and parallel and see what difference it makes!
For extra value, spill the water on the carpet and blame it on the dog.