The Beginner Mat is perfect for an affordable entry into the world of STAX light-up building blocks or for expanding existing sets to give your ideas even more room to play. The included USB Charging Brick features four lighting functions: constant light, blinking, fade in and out, or sound-activated lighting (e.g., in sync with your favorite music). All functions can be used in continuous operation or with automatic shut-off after 15 minutes (Good Night function). A total of 24 STAX in red, green, blue, and yellow are included, along with the USB Charging Brick (size 4x4) and a USB cable (80 cm).