Take one or two stressed parents.
Add several pressing work commitments, a long list of things-to-do-before-leaving and mix with holiday preparations.
Throw in a couple of last-minute hitches.
Top with several over-excited chidlren.
Place everything in cramped car and allow to simmer for several hours on crowded road.
When properaly stewed, remove family from heat, settle at the beach and immerse in fresh or salt water until cool.