Amazon.com: LEGO Technic - differential gears (Gear) 24-16 in the new gray - Complete Set : Toys & Games
LEGO Technic 42055 Bucket Wheel Excavator with instructions and box, RARE 673419248723 | eBay
LEGO Technic McLaren Senna GTR 42123 Racing Sports Collectable Model Car Building Kit, Car Construction Toy, Gift Idea for Kids, Boys and girls - Walmart.com