Wouldn't everyone agree that participating on these forums is, in a sense, just like one big pre-trip?
Over the past 10 years or so, I've accumulated 30 GBs in Disney attraction audio and video, and I know that there's lots more out there. It allows me to live vicariously, as WDW is a 20 car drive from my house, not to mention the fact that my youngest is 2 years old...probably the worst age to take a child - old enough to understand, young enough that pretty much everything can scare the bejeezus out of them.
My ultra-brave daughter took things in stride at 3 1/2 (including riding ToT...she's very tall for her age). Now at 7, her favourite rides are looping rollercoasters (she's 4' 4" tall), but she screamed with excitement the other day when she realized that all attractions are in her range now, even driving the cars alone on the Tomorrowland Indy.