brattery

noun2

1. •
   (informal) Brattish behaviour.
2. •
   (informal) A collection of brats; a children's nursery, etc.

   • Whole bratteries of little Aarons and Abrahams, who invariably after two years old, but sometimes earlier, develop the noses and the expressions of their elders, are also airing at the doors. — 1899