LEGO Friends Cat Birthday Party & Tree House

The LEGO Friends Cat Birthday Party & Tree House (set number 42666) is a colorful construction toy set designed for children aged 6 and up. Part of the popular LEGO Friends theme, it features a cat-themed treehouse and follows the story of 'Churro' the cat's birthday celebration. The set includes minidolls Leo and Paisley along with five cat figures and various accessories like a fish-shaped piñata and cat-themed party decorations.

LEGO products are manufactured across a global network of facilities. Major production sites are located in Billund (Denmark), Nyíregyháza (Hungary), Kladno (Czech Republic), Monterrey (Mexico), and Jiaxing (China), with a new sustainable factory recently opened in Vietnam in 2025. Because individual components and final packaging can happen in different regions depending on the market, the product is categorized as being made in multiple countries.

The LEGO brand has a rich heritage starting in 1932 in Denmark, founded by Ole Kirk Christiansen. Originally a woodworking shop, it evolved into the world's leading toy manufacturer after the invention of the iconic interlocking plastic brick system. Today, the LEGO Group remains a privately held family business, ultimately owned by the founder's descendants through their holding company, ensuring a long-term commitment to creative play.