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.