Click once on the stamp you want to use then click where you want to put it. :3 Press le clear button to erase the stamps. >:3 Press the left and right arrow keys to make the block rotate. Watch this video at CS First to learn how to build it: https://csfirst.withgoogle.com/c/cs-first/en/art/building-blocks-of-architecture/introduction-to-architecture.html If you're a teacher: Lesson plans are also available on the CS First site. If you decide to sign up for a CS First account, you'll be able to track your students' progress, order physical materials (kits), and access your students' projects in Scratch.