Hi Christy!
Without hesitation, YES! Since he is under three, he will get in FREE and will actually be the perfect age for the vast majority of Disney World. As a toddler, the magic is still very real and surprises await around every corner. Mickey Mouse really IS Mickey Mouse and Tinkerbell really does fly over the castle. Take advantage of this small window of opportunity in his little life and enjoy everything through his eyes!
What most people don't realize is that almost everything in Disney is for guests of all ages. Only a handful of rides are intense enough to have a height restriction and for those, you may utilize the Child Swap feature. Basically one adult rides while the other stays with your son and then you switch - just ask the Cast Member at the ride's entrance for a Child Swap pass. You can also take advantage of the fact that he is not yet in school. Those times when most children are in school are usually the least crowded and best times to visit the parks!
Rather than overload you with information, I would love for you to check out the
Traveling with LIttle Ones page on the official Disney World website. They have done such an amazing job with this section - everything from travel tips to special maps just for little ones. Take the time to order the free planning DVD, I'm sure that your little prince will enjoy watching it as much as you do!
I would love to hear from you again!
Much pixie dust,
Jackie S.