Light up your world with Light Stax illuminated blocks! These unique building blocks glow brilliantly with colorful light as you stack them, bringing your designs to life. This set includes lots of green bricks to build reptiles! There are 3 light modes: instant on, flashing and glowing. Lights can be set to stay on or 15-minute auto off. Sound activation base has a function setting that makes the lights flash with sound. Package contains: 105 bricks (8-peg size and 4-peg size), 1 rechargeable battery pack, and 1 USB cable. Fully compatible with other building blocks of similar size.