Downtown is a wonderful place, there are lots of great shops (
Disney store is one of the best)... I love that place and my kids love it too... last time I was there my daughter was 4 and son was 8 and they both enjoyed it very much.. here is what I found on allearsnet.com that I think your kids will enjoy, hope this helps:
Goofy's Candy Company opened Spring 2005 in an expanded form in the former Disney at Home store. The new shop features an interactive show kitchen filled with unique and tasty confections.
LEGO Imagination Center -- From the makers of the world's best-selling construction toys, the LEGO Imagination Center showcases LEGO models that include a larger-than-life dinosaur family, a 30-foot sea serpent, an alien family with spaceship and a group of construction workers "building" the store. Great photo opportunities!
Once Upon A Toy - A great store for kids of all ages! New Disney-themed offerings, popular Hasbro items, and classic games and toys with a Walt Disney World twist. Mr. Potato Head with colorful Disney theme park accessories, a version of the classic detective game Clue set inside Disney's Haunted Mansion attraction, Lincoln Logs, Play Dough, Star Tours action figures from the "Star Wars"-inspired attraction and more. There is even an automated package delivery kiosk to expedite service at the cash register.
World of Disney -- The largest Disney character merchandise store with just about anything Mickey Mouse you can think of! The World of Disney store is HUGE! It is very easy to get separated and/or lost in the store. Keep close watch of your children. When you enter, pick out a landmark so you can more easily find your way out.
The Bibbidi Bobbidi Boutique now also offers a boys' experience called "Cool Dude." Cool Dude offers hair styling, colored gels/sparkles and Mickey stencils for young men looking to enhance their appearance.
All this still does not give it any justice... so just go for a stroll, so much surprises there, have fun!