New subcategories:

Toys & Hobbies / Diecast Models & Toys / Reproduction Boxes

Toys & Hobbies / Diecast Models & Toys / Boxes

New category:

Toys & Hobbies / Robotics & Engineering

New subcategories:

Toys & Hobbies / Robotics & Engineering / Axles

Toys & Hobbies / Robotics & Engineering / Bearings

Toys & Hobbies / Robotics & Engineering / Cams

Toys & Hobbies / Robotics & Engineering / Cogs & Gears

Toys & Hobbies / Robotics & Engineering / Drive Belts

Toys & Hobbies / Robotics & Engineering / Electronics

Toys & Hobbies / Robotics & Engineering / Levers

Toys & Hobbies / Robotics & Engineering / Materials

Toys & Hobbies / Robotics & Engineering / Motors

Toys & Hobbies / Robotics & Engineering / Other

Toys & Hobbies / Robotics & Engineering / Pulleys & Wheels

Toys & Hobbies / Robotics & Engineering / Springs

Toys & Hobbies / Robotics & Engineering / Tubing


Perhaps you could use your newsletter mailing list to separately email a list of new categories and subcategories each month to your sellers.