A large pleasant outdoor patio has plenty of seating and overlooks the model lego city. There is room for kids to move around a bit without disturbing other diners.
Rest rooms are not in the restaurant but are very close by (unfortunately not visible from the seating area).
This used to be a quiet area of the park before the Pirate section opened, but it retains its charm.
Walt Disney World
Tokyo Disney Resort
Theme Park Insider Books