QUATRO bricks, hence the name, are designed to be twice the dimensions of LEGO DUPLO bricks. The name "QUATRO" also signifies that the blocks are quadruple the dimensions of the traditional LEGO System blocks. QUATRO bricks are compatible with DUPLO and System bricks. These pieces were baby-friendly, and were specially designed to endure teething. In addition, they are the largest-scale elements ever created.
2004 was the first year for QUATRO starting off with 4 sets (5355-5358), all which include a plastic bucket to contain, store, and build from and had a lid that was a building plate to start creations on.
In the last year QUATRO brought out 3 sets, and the only QUATRO Figure included in 5470.