Duplo to Brio Connector by Tritschi | Download free STL model | Printables.com
Lego DUPLO Castle Set 4828 PRINCESS ROYAL STABLES RARE w EXTRAS + BOX 100% Comp | eBay
Duplo Farm Plow Type 1, Roller Holder with Red Duplo Farm Plow Type 1, Roller Attachment, Smooth with Yellow Cylindrical Stripe Pattern (4828 / 30135) : Part 4828c02pb01 | BrickLink
Duplo Farm Plow Type 1, Roller Holder : Part 4828 | BrickLink