What are clouds made of? At the LEGO® Classic Cerulean Sky Castle they’re made of bricks, but what would YOU make clouds out of if you could choose? Download the free LEGO building instructions for inspiration, and to help you get started building your own castle using bricks from the 10698 LEGO Classic Large Creative Brick Box. What kinds of vehicles do you think would be able to travel in the clouds? What do you think a car with wings would look like? What if you replaced the wheels on a bicycle with propellers? Use your LEGO bricks to build and find out!