Hi Dana!
What fun parents! As if a trip to Walt Disney World alone isn't enough, you want to make it even more fun and exciting by individualizing it for each of your children! And, of course Disney has lots of incredible ideas...here are a few:
For the adventurous "tomboy": I recommend a trip to one of the Walt Disney World Resorts
Marinas with Watercraft Rentals. You can rent her one of many different types of watercraft available, such as Sea Raycers, pontoon boats, kayaks, canoes, pedal boats and more,so she can explore the Disney water ways!
Or, check out one of the many
Tours and Experiences available, such as the Wild Africa Trek, Wild by Design Tour, Dolphins in Depth, or EPCOT Divequest.
For the girly-girl, she might be interested in the
Bibbidi Bobbidi Boutique, for girls ages 3 to 12, where she will be given the "Princess Makeover" of her dreams!
And for the boy, there's no escaping the
Pirate's League, where he'll be transformed into the Pirate of your worst, or best?, nightmares! It's aaaaargh-uably one of the best experiences in all of Disney for young boys AND girls!
And for the entire family to enjoy, I highly recommend the
Pirates and Pals Fireworks Voyage - it's a MUST DO!
I hope this helps get you started with some ideas. You guys have an amazing time!