LEGO® Minecraft™ 21173 The Sky TowerLEGO Minecraft The Sky Tower (21173) is filled with authentic action and diverse environments that kids with a passion for Minecraft can reconfigure again and again for endless adventures in the clouds. Sky high Minecraft creativity Kids use cool, authentic Minecraft features to fly into the sky and build a floating blacksmiths house, a soaring tower and a garden island. The play possibilities range from growing vegetables to battling flying phantoms.