I also keep and breed D'Uccle Belgian bantams.
Belgians are a beautiful little bird that are extremely easy to own. They are extremely well suited for children due to their gentle and easy natures.
They are a "true" bantam meaning they have no larger counter-part and thus throughout history have been of the current approximate size.
This is also a very ancient breed with paintings and writings describing these little kings of the poultry world as far back as the 1600's with some suggestions of the breed being available a century earlier. Unfortunately their origin is also in dispute due to a lack of record keeping etc.
Some of their amazing colours (of which there are some 25 plus) include:
Black Lavender Black Mottled

Mille Fleur Porcelaine Quail