With STAX, there are now building blocks whose light-up function opens up further, completely new creative freedom. By simply plugging the bricks together (one nub is enough for the connection), the light-up function is passed on and thus brick after brick is made to glow. So first the building blocks and then the children's eyes light up! The STAX bricks are 100% compatible with standard (non-luminous) bricks, such as Duplo. From 4 years. This set contains 15 building blocks of the colors red, yellow, orange, green, blue and white, as well as a USB Battery Power Brick and a cable.