The LEGO Friends Pets subtheme focuses on everyday pet care, adoption, and animal playtime in Heartlake City, spanning from 2012's 3935 Stephanie's Pet Patrol and 3942 Heartlake Dog Show through long-running releases like 41698 Pet Playground, 42615 Pet Adoption Day, and 42666 Cat Birthday Party & Tree House. The line covers hamsters, guinea pigs, cats, dogs, and bunnies with playsets such as 42612 Cat Playground Adventure, 42635 Dog Grooming Car, 42640 Guinea Pig Playground, and 42651 Horse and Pet Vet Clinic. Recent 2026 releases include 42678 Pet Accessories Van and 42679 Heartlake City Bunny Hotel.
2012 LEGO Sets
2012 was a landmark year highlighted by LEGO’s 80th anniversary and major licensed expansions. LEGO The Lord of the Rings and The Hobbit joined the lineup alongside Marvel and DC Super Heroes, establishing enduring partnerships with both comic universes. LEGO Friends debuted, introducing mini-doll figures and Heartlake City, becoming one of LEGO’s most successful modern themes. Other launches included Monster Fighters, Disney Princess, and Dino. Alien Conquest, Atlantis, Pharaoh’s Quest, Kingdoms, and Harry Potter retired, though Harry Potter would later return in 2018.