LEGO QUATRO was a theme that used specialized QUATRO blocks which were larger than DUPLO bricks. The theme was released in 2004 and was designed for pre-school children and babies ages 1 to 3 and was discontinued in 2006. The name QUATRO comes from the fact that the bricks were quadruple the dimensions of the traditional LEGO System bricks. The logo of QUATRO is an elephant which is the same as the old logo of Primo.
2005 LEGO Sets
In 2005, LEGO saw major developments in set design, theme evolution, and digital expansion, marking a turning point for collectors and the company's resurgence. One of the most notable milestones was the 50th anniversary of the LEGO System, celebrating five decades of the iconic brick's interlocking design.