It isn't really a class, per se...it's called Animation Academy and is in the Animation Courtyard Building, and is what comes after the Drawn to Animation show. You go in, sit at animator's desks and a Disney animator teaches you to draw a character. It takes about 15 minutes and is free. You can take your drawing with you. It is appropriate for any age that can hold a pencil and draw what they tell you to, so even a 3 year old could try. They might not get artist results, but then neither do I (and I haven't seen 3 for a long long time!) You can go without seeing the Drawn to Animation show too, just walk through the store and into the exhibits and get in line.
Sara