WARNING!

Never, ever, ever take 4 children under the age of 5 to a theme park when they've had a full night sleep and you've only had 4 hours sleep.
 
BAD IDEA!!
 
Believe me, I found out the hard way.  I was sleeping on myself on the majority of the rides and they (and the thousands of other miserable children) were screaming in my ear, intensifying my headache (nahh, it ain't a hangover...i just needed a couple more hours sleep and i would've been good).